Updated on 2025/10/09

写真b

 
KAMEDA Shingo
 
*Items subject to periodic update by Rikkyo University (The rest are reprinted from information registered on researchmap.)
Affiliation*
College of Science Department of Physics
Graduate School of Science Doctoral Program in Physics
Graduate School of Science Master's Program in Physics
Title*
Professor
Degree
博士(理学) （ 東京大学 ）
Research Interests

  • Planetary Science

    • Campus Career*
    • 4 2018 - Present 
      College of Science   Department of Physics   Professor
    • 4 2018 - Present 
      Graduate School of Science   Master's Program in Physics   Professor
    • 4 2018 - Present 
      Graduate School of Science   Doctoral Program in Physics   Professor
    • 4 2011 - 3 2018 
      College of Science   Department of Physics   Associate Professor
    • 4 2011 - 3 2018 
      Graduate School of Science   Master's Program in Physics   Associate Professor
    • 4 2011 - 3 2018 
      Graduate School of Science   Doctoral Program in Physics   Associate Professor

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    Research Areas

    • Natural Science / Space and planetary science

    Research History

    • 8 2022 - Present 
      Japan Aerospace Exploration Agency   Institute of Space and Astronautical Science   Specially Appointed Professor

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    • 11 2020 - Present 
      Japan Aerospace Exploration Agency   Institute of Space and Astronautical Science   Specially Appointed Professor

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    • 4 2018 - Present 
      RIKKYO UNIVERSITY   College of Science Department of Physics   Professor

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    • 4 2018 - Present 
      RIKKYO UNIVERSITY   Graduate School of Science Field of Study: Physics   Professor

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    • 4 2018 - Present 
      RIKKYO UNIVERSITY   Graduate School of Science Field of Study: Physics   Professor

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    • 4 2011 - 3 2018 
      RIKKYO UNIVERSITY   College of Science Department of Physics   Associate Professor

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    Education

    • 4 2004 - 3 2007 
      The University of Tokyo   Graduate School, Division of Science   Department of Earth and Planetary Science

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      Country： Japan

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    • 4 2002 - 3 2004 
      The University of Tokyo   Graduate School, Division of Science   Department of Earth and Planetary Science

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      Country： Japan

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    • 4 1997 - 3 2002 
      The University of Tokyo   Faculty of Science   Department of Earth and Planetary Science

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      Country： Japan

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    Awards

    • 4 2023  
      Japan Geoscience Union  The Nishida Prize for Promotion of Geo- and Planetary Science  Studies on surface and atmosphere of celestial bodies using instruments onboard spacecraft
       
      Shingo Kameda

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    Papers

    • Results from Hisaki and prospects for LAPYUTA observations of the Jupiter System

      Fuminori Tsuchiya, Go Murakami, Atsushi Yamazaki, Kazuo Yoshioka, Masato Kagitani, Tomoki Kimura, Chihiro Tao, Ryoichi Koga, Hajime Kita, Jun Kimura, Shuya Tan, Kei Masunaga, Shotaro Sakai, Mizuki Yoneda, Masaki Kuwabara, Shingo Kameda, Ichiro Yoshikawa

          18 3 2025

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      Publisher：Copernicus GmbH  

      Remote sensing with ultraviolet wavelength (UV) are one of powerful probes to uncover dynamic behaviors of the planetary environment. The Hisaki satellite was an earth orbiting extreme ultraviolet (EUV) spectroscope dedicated for observing solar system planets. Thanks to its long-term monitoring capability, Hisaki had carried out unprecedented continuous observation of Io plasma torus, Jovian aurora, and Mars and Venus upper atmospheres from 2013 to 2023. One of notable phenomena observed by Hisaki is significant enhancements of neutral gas from presumed activation of volcanic activity on Io. Hisaki revealed, for the first time, that not only the plasma source, but transport, heating, and loss processes of magnetospheric plasma were influenced by the variation in the neutral source input.After the end of the Hisaki mission, we have proposed the next UV space telescope, LAPYUTA (Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly). One of goals of this mission is dynamics of our solar system planets and moons as the most quantifiable archetypes of extraterrestrial habitable environments in the universe. LAPYUTA will not only provide a UV monitoring platform like Hisaki but also have a high spatial resolution and high sensitivity to uncover stability of Io’s atmosphere, water plumes that gushes from the subsurface ocean of icy moons, and spatio-temporal aspects of Jupiter's giant UV aurora. Primary goal of the LAPYUTA mission other than the Jovian system includes atmospheric evolution of Venus and Mars, characterization of exoplanet atmosphere, galaxy formation, and time-domain astronomy.

      DOI： 10.5194/egusphere-egu25-14544

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    • Comparison of optical spectra between asteroids Ryugu and Bennu: II. High-precision analysis for space weathering trends

      K. Yumoto, E. Tatsumi, T. Kouyama, D. R. Golish, Y. Cho, T. Morota, S. Kameda, H. Sato, B. Rizk, D. N. DellaGiustina, Y. Yokota, H. Suzuki, J. de León, H. Campins, J. Licandro, M. Popescu, J. L. Rizos, R. Honda, M. Yamada, N. Sakatani, C. Honda, M. Matsuoka, M. Hayakawa, H. Sawada, K. Ogawa, Y. Yamamoto, D. S. Lauretta, S. Sugita

      Icarus420   15 9 2024

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.icarus.2024.116204

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    • Elemental analyses of feldspathic to basaltic soils and rocks on the moon using laser-induced breakdown spectroscopy

      K. Yumoto, Y. Cho, Jo A. Ogura, S. Kameda, T. Niihara, T. Nakaoka, R. Kanemaru, H. Nagaoka, H. Tabata, Y. Nakauchi, M. Ohtake, H. Ueda, S. Kasahara, T. Morota, S. Sugita

      Spectrochimica Acta Part B: Atomic Spectroscopy   107049 - 107049   9 2024

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.sab.2024.107049

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    • Overview of the LAPYUTA mission (Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly)

      Fuminori Tsuchiya, Go Murakami, Atsushi Yamazaki, Shingo Kameda, Tomoki Kimura, Ryoichi Koga, Kei Masunaga, Shotaro Sakai, Masahiro Ikoma, Akifumi Nakayama, Masami Ouchi, Masaomi Tanaka, Shin Toriumi, Masato Kagitani, Kazuo Yoshioka, Chihiro Tao, Hajime Kita, Hidenobu Yajima, Hideo Sagawa, Hiromu Nakagawa, Hitoshi Hamori, Jun Kimura, Keigo Enya, Kosuke Namekata, Manabu Yamada, Masaki Kuwabara, Naoki Terada, Naoya Ozaki, Norio Narita, Sae Aizawa, Seiko Takagi, Shinitiro Sakai, Shohei Aoki, Shoya Matsuda, Shuya Tan, Takahiro Sumi, Takanori Kodama, Takashi Moriya, Takatoshi Shibuya, Takehiko Satoh, Taro Kawano, Nozomu Tominaga, Toshifumi Shimizu, Yasumasa Kasaba, Yoichi Yatsu, Yoshiaki Ono, Yudai Suzuki, Yuichi Matsuda, Yuki Harada, Yuta Notsu

      Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray   18 - 18   21 8 2024

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      Publishing type：Research paper (international conference proceedings)   Publisher：SPIE  

      DOI： 10.1117/12.3017298

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    • Study on the possibility of comet observation using ONC-W2 camera during the cruising phase of Hayabusa2

      Yasuhiro Yokota, Toru Kouyama, Tomokatsu Morota, Naoya Sakatani, Seiji Sugita, Manabu Yamada, Eri Tatsumi, Moe Matsuoka, Masahiko Hayakawa, Koki Yumoto, Hideo Kawakita, Yoshiharu Shinnaka, Rie Honda, Chikatoshi Honda, Yuichiro Cho, Shingo Kameda, Hidehiko Suzuki, Kazuo Yoshioka, Hirotaka Sawada, Kazunori Ogawa

          3 7 2024

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    • Comparison of optical spectra between asteroids Ryugu and Bennu: I. Cross calibration between Hayabusa2/ONC-T and OSIRIS-REx/MapCam

      K. Yumoto, E. Tatsumi, T. Kouyama, D.R. Golish, Y. Cho, T. Morota, S. Kameda, H. Sato, B. Rizk, D.N. DellaGiustina, Y. Yokota, H. Suzuki, J. de León, H. Campins, J. Licandro, M. Popescu, J.L. Rizos, R. Honda, M. Yamada, N. Sakatani, C. Honda, M. Matsuoka, M. Hayakawa, H. Sawada, K. Ogawa, Y. Yamamoto, D.S. Lauretta, S. Sugita

      Icarus417   116122 - 116122   7 2024

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.icarus.2024.116122

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    • The Comet Interceptor Mission

      Geraint H. Jones, Colin Snodgrass, Cecilia Tubiana, Michael Küppers, Hideyo Kawakita, Luisa M. Lara, Jessica Agarwal, Nicolas André, Nicholas Attree, Uli Auster, Stefano Bagnulo, Michele Bannister, Arnaud Beth, Neil Bowles, Andrew Coates, Luigi Colangeli, Carlos Corral van Damme, Vania Da Deppo, Johan De Keyser, Vincenzo Della Corte, Niklas Edberg, Mohamed Ramy El-Maarry, Sara Faggi, Marco Fulle, Ryu Funase, Marina Galand, Charlotte Goetz, Olivier Groussin, Aurélie Guilbert-Lepoutre, Pierre Henri, Satoshi Kasahara, Akos Kereszturi, Mark Kidger, Matthew Knight, Rosita Kokotanekova, Ivana Kolmasova, Konrad Kossacki, Ekkehard Kührt, Yuna Kwon, Fiorangela La Forgia, Anny-Chantal Levasseur-Regourd, Manuela Lippi, Andrea Longobardo, Raphael Marschall, Marek Morawski, Olga Muñoz, Antti Näsilä, Hans Nilsson, Cyrielle Opitom, Mihkel Pajusalu, Antoine Pommerol, Lubomir Prech, Nicola Rando, Francesco Ratti, Hanna Rothkaehl, Alessandra Rotundi, Martin Rubin, Naoya Sakatani, Joan Pau Sánchez, Cyril Simon Wedlund, Anamarija Stankov, Nicolas Thomas, Imre Toth, Geronimo Villanueva, Jean-Baptiste Vincent, Martin Volwerk, Peter Wurz, Arno Wielders, Kazuo Yoshioka, Konrad Aleksiejuk, Fernando Alvarez, Carine Amoros, Shahid Aslam, Barbara Atamaniuk, Jędrzej Baran, Tomasz Barciński, Thomas Beck, Thomas Behnke, Martin Berglund, Ivano Bertini, Marcin Bieda, Piotr Binczyk, Martin-Diego Busch, Andrei Cacovean, Maria Teresa Capria, Chris Carr, José María Castro Marín, Matteo Ceriotti, Paolo Chioetto, Agata Chuchra-Konrad, Lorenzo Cocola, Fabrice Colin, Chiaki Crews, Victoria Cripps, Emanuele Cupido, Alberto Dassatti, Björn J. R. Davidsson, Thierry De Roche, Jan Deca, Simone Del Togno, Frederik Dhooghe, Kerri Donaldson Hanna, Anders Eriksson, Andrey Fedorov, Estela Fernández-Valenzuela, Stefano Ferretti, Johan Floriot, Fabio Frassetto, Jesper Fredriksson, Philippe Garnier, Dorota Gaweł, Vincent Génot, Thomas Gerber, Karl-Heinz Glassmeier, Mikael Granvik, Benjamin Grison, Herbert Gunell, Tedjani Hachemi, Christian Hagen, Rajkumar Hajra, Yuki Harada, Johann Hasiba, Nico Haslebacher, Miguel Luis Herranz De La Revilla, Daniel Hestroffer, Tilak Hewagama, Carrie Holt, Stubbe Hviid, Iaroslav Iakubivskyi, Laura Inno, Patrick Irwin, Stavro Ivanovski, Jiri Jansky, Irmgard Jernej, Harald Jeszenszky, Jaime Jimenéz, Laurent Jorda, Mihkel Kama, Shingo Kameda, Michael S. P. Kelley, Kamil Klepacki, Tomáš Kohout, Hirotsugu Kojima, Tomasz Kowalski, Masaki Kuwabara, Michal Ladno, Gunter Laky, Helmut Lammer, Radek Lan, Benoit Lavraud, Monica Lazzarin, Olivier Le Duff, Qiu-Mei Lee, Cezary Lesniak, Zoe Lewis, Zhong-Yi Lin, Tim Lister, Stephen Lowry, Werner Magnes, Johannes Markkanen, Ignacio Martinez Navajas, Zita Martins, Ayako Matsuoka, Barbara Matyjasiak, Christian Mazelle, Elena Mazzotta Epifani, Mirko Meier, Harald Michaelis, Marco Micheli, Alessandra Migliorini, Aude-Lyse Millet, Fernando Moreno, Stefano Mottola, Bruno Moutounaick, Karri Muinonen, Daniel R. Müller, Go Murakami, Naofumi Murata, Kamil Myszka, Shintaro Nakajima, Zoltan Nemeth, Artiom Nikolajev, Simone Nordera, Dan Ohlsson, Aire Olesk, Harald Ottacher, Naoya Ozaki, Christophe Oziol, Manish Patel, Aditya Savio Paul, Antti Penttilä, Claudio Pernechele, Joakim Peterson, Enrico Petraglio, Alice Maria Piccirillo, Ferdinand Plaschke, Szymon Polak, Frank Postberg, Herman Proosa, Silvia Protopapa, Walter Puccio, Sylvain Ranvier, Sean Raymond, Ingo Richter, Martin Rieder, Roberto Rigamonti, Irene Ruiz Rodriguez, Ondrej Santolik, Takahiro Sasaki, Rolf Schrödter, Katherine Shirley, Andris Slavinskis, Balint Sodor, Jan Soucek, Peter Stephenson, Linus Stöckli, Paweł Szewczyk, Gabor Troznai, Ludek Uhlir, Naoto Usami, Aris Valavanoglou, Jakub Vaverka, Wei Wang, Xiao-Dong Wang, Gaëtan Wattieaux, Martin Wieser, Sebastian Wolf, Hajime Yano, Ichiro Yoshikawa, Vladimir Zakharov, Tomasz Zawistowski, Paola Zuppella, Giovanna Rinaldi, Hantao Ji

      Space Science Reviews220 ( 1 )   24 1 2024

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating at another star. The objectives of the mission are to address the following questions: What are the surface composition, shape, morphology, and structure of the target object? What is the composition of the gas and dust in the coma, its connection to the nucleus, and the nature of its interaction with the solar wind? The mission was proposed to the European Space Agency in 2018, and formally adopted by the agency in June 2022, for launch in 2029 together with the Ariel mission. Comet Interceptor will take advantage of the opportunity presented by ESA’s F-Class call for fast, flexible, low-cost missions to which it was proposed. The call required a launch to a halo orbit around the Sun-Earth L2 point. The mission can take advantage of this placement to wait for the discovery of a suitable comet reachable with its minimum $\varDelta $V capability of $600\text{ ms}^{-1}$. Comet Interceptor will be unique in encountering and studying, at a nominal closest approach distance of 1000 km, a comet that represents a near-pristine sample of material from the formation of the Solar System. It will also add a capability that no previous cometary mission has had, which is to deploy two sub-probes – B1, provided by the Japanese space agency, JAXA, and B2 – that will follow different trajectories through the coma. While the main probe passes at a nominal 1000 km distance, probes B1 and B2 will follow different chords through the coma at distances of 850 km and 400 km, respectively. The result will be unique, simultaneous, spatially resolved information of the 3-dimensional properties of the target comet and its interaction with the space environment. We present the mission’s science background leading to these objectives, as well as an overview of the scientific instruments, mission design, and schedule.

      DOI： 10.1007/s11214-023-01035-0

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      Other Link： https://link.springer.com/article/10.1007/s11214-023-01035-0/fulltext.html

    • Fraunhofer line-based wavelength-calibration method without calibration targets for planetary lander instruments

      Shoki Mori, Yuichiro Cho, Haruhisa Tabata, Koki Yumoto, Ute Böttger, Maximilian Buder, Enrico Dietz, Till Hagelschuer, Heinz-Wilhelm Hübers, Shingo Kameda, Emanuel Kopp, Olga Prieto-Ballesteros, Fernando Rull, Conor Ryan, Susanne Schröder, Tomohiro Usui, Seiji Sugita

      Planetary and Space Science240   105835 - 105835   1 2024

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.pss.2023.105835

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    • Optimizing Image Compression Ratio for Generating Highly Accurate Local Digital Terrain Models: Experimental Study for Martian Moons eXploration Mission

      Yuta Shimizu, Hideaki Miyamoto, Shingo Kameda

      Remote Sensing   17 10 2023

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.20944/preprints202310.1027.v1

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    • Space weathering acts strongly on the uppermost surface of Ryugu

      Moe Matsuoka, Ei-ichi Kagawa, Kana Amano, Tomoki Nakamura, Eri Tatsumi, Takahito Osawa, Takahiro Hiroi, Ralph Milliken, Deborah Domingue, Driss Takir, Rosario Brunetto, Antonella Barucci, Kohei Kitazato, Seiji Sugita, Yuri Fujioka, Osamu Sasaki, Shiho Kobayashi, Takahiro Iwata, Tomokatsu Morota, Yasuhiro Yokota, Toru Kouyama, Rie Honda, Shingo Kameda, Yuichiro Cho, Kazuo Yoshioka, Hirotaka Sawada, Masahiko Hayakawa, Naoya Sakatani, Manabu Yamada, Hidehiko Suzuki, Chikatoshi Honda, Kazunori Ogawa, Kei Shirai, Cateline Lantz, Stefano Rubino, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda

      Communications Earth & Environment4 ( 1 )   27 9 2023

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      Returned samples from Cb-type asteroid (162173) Ryugu exhibit very dark spectra in visible and near-infrared ranges, generally consistent with the Hayabusa2 observations. A critical difference is that a structural water absorption of hydrous silicates is around twice as deep in the returned samples compared with those of Ryugu’s surface, suggesting Ryugu surface is more dehydrated. Here we use laboratory experiments data to indicate the spectral differences between returned samples and asteroid surface are best explained if Ryugu surface has (1) higher porosity, (2) larger particle size, and (3) more space-weathered condition, with the last being the most effective. On Ryugu, space weathering by micrometeoroid bombardments promoting dehydration seem to be more effective than that by solar-wind implantation. Extremely homogeneous spectra of the Ryugu’s global surface is in contrast with the heterogeneous S-type asteroid (25143) Itokawa’s spectra, which suggests space weathering has proceeded more rapidly on Cb-type asteroids than S-type asteroids.

      DOI： 10.1038/s43247-023-00991-3

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      Other Link： https://www.nature.com/articles/s43247-023-00991-3

    • In-situ measurement of hydrogen on airless planetary bodies using laser-induced breakdown spectroscopy

      Koki Yumoto, Yuichiro Cho, Shingo Kameda, Satoshi Kasahara, Seiji Sugita

      Spectrochimica Acta Part B: Atomic Spectroscopy205   106696 - 106696   7 2023

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.sab.2023.106696

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    • Initial Result of Heliocentric Distance Dependence of Zodiacal Light Observed by Hayabusa2#

      Kohji Tsumura, Shuji Matsuura, Kei Sano, Takahiro Iwata, Kohji Takimoto, Manabu Yamada, Tomokatsu Morota, Toru Kouyama, Masahiko Hayakawa, Yasuhiro Yokota, Eri Tatsumi, Moe Matsuoka, Naoya Sakatani, Rie Honda, Shingo Kameda, Hidehiko Suzuki, Yuichiro Cho, Kazuo Yoshioka, Kazunori Ogawa, Kei Shirai, Hirotaka Sawada, Seiji Sugita

          9 3 2023

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      Publisher：Research Square Platform LLC  

      Abstract

      The zodiacal light (ZL) is sunlight scattered by interplanetary dust (IPD) in the optical wavelengths. The spatial distribution of IPD in the Solar system may hold an important key to understanding the evolution of the Solar system and material transportation within it. The IPD number density can be expressed as [[EQUATION]] , and the result of [[EQUATION]] was obtained by the previous observations from the interplanetary space by Helios 1/2 and Pioneer 10/11 in the 1970s and 1980s. However, no direct measurements of [[EQUATION]] based on the ZL observation from the interplanetary space outside the Earth's orbit have been conducted since then. Here we introduce the initial result of the ZL radial profile at optical wavelengths observed at 0.76-1.06 au by ONC-T with Hayabusa2# mission in 2021-2022. The obtained ZL brightness is well reproduced by the model brightness, but there is a small excess of the observed ZL brightness over the model brightness at around 0.9 au. The obtained radial power-law index is [[EQUATION]] , which is consistent with the previous results based on the ZL observations. The dominant uncertainty source arises from the uncertainty in the Diffuse Galactic Light estimation.

      DOI： 10.21203/rs.3.rs-2660358/v1

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      Other Link： https://www.researchsquare.com/article/rs-2660358/v1.html

    • Inflight calibration of the optical navigation camera for the extended mission phase of Hayabusa2

      Manabu Yamada, Toru Kouyama, Koki Yumoto, Eri Tatsumi, Naofumi Takaki, Yasuhiro Yokota, Tomokatsu Morota, Naoya Sakatani, Masahiko Hayakawa, Moe Matsuoka, Rie Honda, Chikatoshi Honda, Shingo Kameda, Hidehiko Suzuki, Yuichiro Cho, Kazuo Yoshioka, Kazunori Ogawa, Kei Shirai, Hirotaka Sawada, Seiji Sugita

      EARTH PLANETS AND SPACE75 ( 1 )   3 2023

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1186/s40623-023-01789-5

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    • The Mars system revealed by the Martian Moons eXploration mission

      Kazunori Ogohara, Hiromu Nakagawa, Shohei Aoki, Toru Kouyama, Tomohiro Usui, Naoki Terada, Takeshi Imamura, Franck Montmessin, David Brain, Alain Doressoundiram, Thomas Gautier, Takuya Hara, Yuki Harada, Hitoshi Ikeda, Mizuho Koike, François Leblanc, Ramses Ramirez, Eric Sawyer, Kanako Seki, Aymeric Spiga, Ann Carine Vandaele, Shoichiro Yokota, Antonella Barucci, Shingo Kameda

      Earth, Planets and Space74 ( 1 )   12 2022

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      Japan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration). In this study, we review the related works on the past climate of Mars, its evolution, and the present climate and weather to describe the scientific goals and strategies of the MMX mission regarding the evolution of the Martian surface environment. The MMX spacecraft will retrieve and return a sample of Phobos regolith back to Earth in 2029. Mars ejecta are expected to be accumulated on the surface of Phobos without being much shocked. Samples from Phobos probably contain all types of Martian rock from sedimentary to igneous covering all geological eras if ejecta from Mars could be accumulated on the Phobos surface. Therefore, the history of the surface environment of Mars can be restored by analyzing the returned samples. Remote sensing of the Martian atmosphere and monitoring ions escaping to space while the spacecraft is orbiting Mars in the equatorial orbit are also planned. The camera with multi-wavelength filters and the infrared spectrometer onboard the spacecraft can monitor rapid transport processes of water vapor, dust, ice clouds, and other species, which could not be traced by the previous satellites on the sun-synchronous polar orbit. Such time-resolved pictures of the atmospheric phenomena should be an important clue to understand both the processes of water exchange between the surface/underground reservoirs and the atmosphere and the drivers of efficient material transport to the upper atmosphere. The mass spectrometer with unprecedented mass resolution can observe ions escaping to space and monitor the atmospheric escape which has made the past Mars to evolve towards the cold and dry surface environment we know today. Together with the above two instruments, it can potentially reveal what kinds of atmospheric events can transport tracers (e.g., H<sub>2</sub>O) upward and enhance the atmospheric escape.

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      DOI： 10.1186/s40623-021-01417-0

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      Other Link： https://link.springer.com/article/10.1186/s40623-021-01417-0/fulltext.html

    • Particle size distributions inside and around the artificial crater produced by the Hayabusa2 impact experiment on Ryugu

      K. Ogawa, N. Sakatani, T. Kadono, M. Arakawa, R. Honda, K. Wada, K. Shirai, Y. Shimaki, K. Ishibashi, Y. Yokota, T. Saiki, H. Imamura, Y. Tsuda, S. Nakazawa, Y. Takagi, M. Hayakawa, H. Yano, C. Okamoto, Y. Iijima, T. Morota, S. Kameda, E. Tatsumi, Y. Cho, K. Yoshioka, H. Sawada, M. Matsuoka, M. Yamada, T. Kouyama, H. Suzuki, C. Honda, S. Sugita

      Earth, Planets and Space74 ( 1 )   17 10 2022

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      Japanese Hayabusa2 spacecraft has successfully carried out an impact experiment using a small carry-on impactor (SCI) on an asteroid (162173) Ryugu. We examine the size distribution of particles inside and outside an artificial impact crater (the SCI crater) based on the images taken by the optical navigation camera onboard the Hayabusa2 spacecraft. The circumferential variation in particle size distribution inside the SCI crater is recognized and we interpret that major circumferential variation is caused by the large boulders inside the SCI crater that existed prior to the impact. The size distribution inside the SCI crater also shows that the subsurface layer beneath the SCI impact site had a large number of particles with a characteristic size of – 9 cm, which is consistent with the previous evaluations. On the other hand, the size distribution outside the SCI crater exhibits the radial variation, implying that the deposition of ejecta from the SCI crater is involved. The slope of the size distribution outside the crater at small sizes differs from the slope of the size distribution on the surface of Ryugu by approximately 1 or slightly less. This is consistent with the claim that some particles are buried in fine particles of the subsurface origin included in ejecta from the SCI crater. Thus, the particle size distributions inside and outside the SCI crater reveal that the subsurface layer beneath the SCI impact site is rich in fine particles with – 9 cm in size while the particles on the surface have a size distribution of a power-law form with shallower slopes at small sizes due to the deposition of fine ejecta from the subsurface layer. Finally, we discuss a process responsible for this difference in particle size distribution between the surface and the subsurface layers. The occurrence of segregation in the gravitational flow of particles on the surface of Ryugu is plausible.

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      DOI： 10.1186/s40623-022-01713-3

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      Other Link： https://link.springer.com/article/10.1186/s40623-022-01713-3/fulltext.html

    • Characterization of the MASCOT landing area by Hayabusa2

      Stefan Schröder, Naoya Sakatani, Rie Honda, Eri Tatsumi, Yasuhiro Yokota, Deborah Domingue, Yuichiro Cho, Shingo Kameda, Kohei Kitazato, Toru Kouyama, Moe Matsuoka, Akira Miura, Tomokatsu Morota, Tatsuaki Okada, Hirotaka Sawada, Hiroki Senshu, Yuri Shimaki, Seiji Sugita, Satoshi Tanaka, Hikaru Yabuta, Manabu Yamada, Matthias Grott, Maximilian Hamm, Tra-Mi Ho, Ralf Jaumann, Stefano Mottola, Katharina Otto, Nicole Schmitz, Frank Scholten

      Astronomy &amp; Astrophysics666   A164 - A164   10 2022

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      Publishing type：Research paper (scientific journal)   Publisher：EDP Sciences  

      Context. After landing on C-type asteroid Ryugu, MASCOT imaged brightly colored, submillimeter-sized inclusions in a small rock. Hayabusa2 successfully returned a sample of small particles from the surface of Ryugu, but none of these appear to harbor such inclusions. The samples are considered representative of Ryugu.

      Aims. To understand the apparent discrepancy between MASCOT observations and Ryugu samples, we assess whether the MASCOT landing site, and the rock by implication, is perhaps atypical for Ryugu.

      Methods. We analyzed observations of the MASCOT landing area acquired by three instruments on board Hayabusa2: a camera (ONC), a near-infrared spectrometer (NIRS3), and a thermal infrared imager. We compared the landing area properties thus retrieved with those of the average Ryugu surface.

      Results. We selected several areas and landforms in the landing area for analysis: a small crater, a collection of smooth rocks, and the landing site itself. The crater is relatively blue and the rocks are relatively red. The spectral and thermophysical properties of the landing site are very close to those of the average Ryugu surface. The spectral properties of the MASCOT rock are probably close to average, but its thermal inertia may be somewhat higher.

      Conclusions. The MASCOT rock can also be considered representative of Ryugu. Some of the submillimeter-sized particles in the returned samples stand out because of their atypical spectral properties. Such particles may be present as inclusions in the MASCOT rock.

      DOI： 10.1051/0004-6361/202244059

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    • Site selection for the Hayabusa2 artificial cratering and subsurface material sampling on Ryugu Peer-reviewed

      Shota Kikuchi, Sei ichiro Watanabe, Koji Wada, Takanao Saiki, Hikaru Yabuta, Seiji Sugita, Masanao Abe, Masahiko Arakawa, Yuichiro Cho, Masahiko Hayakawa, Naoyuki Hirata, Naru Hirata, Chikatoshi Honda, Rie Honda, Ko Ishibashi, Yoshiaki Ishihara, Takahiro Iwata, Toshihiko Kadono, Shingo Kameda, Kohei Kitazato, Toru Kouyama, Koji Matsumoto, Moe Matsuoka, Tatsuhiro Michikami, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Tomoki Nakamura, Satoru Nakazawa, Noriyuki Namiki, Rina Noguchi, Kazunori Ogawa, Naoko Ogawa, Tatsuaki Okada, Go Ono, Naoya Sakatani, Hirotaka Sawada, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Shogo Tachibana, Yuto Takei, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Manabu Yamada, Yukio Yamamoto, Yasuhiro Yokota, Kent Yoshikawa, Makoto Yoshikawa, Yuichi Tsuda

      Planetary and Space Science219   15 9 2022

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      DOI： 10.1016/j.pss.2022.105519

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    • Three-axial shape distributions of pebbles, cobbles and boulders smaller than a few meters on asteroid Ryugu

      Tatsuhiro Michikami, Axel Hagermann, Tomokatsu Morota, Yasuhiro Yokota, Seitaro Urakawa, Hiroyuki Okamura, Naoya Tanabe, Koki Yumoto, Tatsuki Ebihara, Yuichiro Cho, Carolyn M. Ernst, Masahiko Hayakawa, Masatoshi Hirabayashi, Naru Hirata, Chikatoshi Honda, Rie Honda, Shingo Kameda, Masanori Kanamaru, Hiroshi Kikuchi, Shota Kikuchi, Toru Kouyama, Moe Matsuoka, Hideaki Miyamoto, Takaaki Noguchi, Rina Noguchi, Kazunori Ogawa, Tatsuaki Okada, Naoya Sakatani, Sho Sasaki, Hirotaka Sawada, Chiho Sugimoto, Hidehiko Suzuki, Satoshi Tanaka, Eri Tatsumi, Akira Tsuchiyama, Yuichi Tsuda, Sei ichiro Watanabe, Manabu Yamada, Makoto Yoshikawa, Kazuo Yoshioka, Seiji Sugita

      Icarus381   15 7 2022

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      DOI： 10.1016/j.icarus.2022.115007

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    • Resurfacing processes constrained by crater distribution on Ryugu

      Naofumi Takaki, Yuichiro Cho, Tomokatsu Morota, Eri Tatsumi, Rie Honda, Shingo Kameda, Yasuhiro Yokota, Naoya Sakatani, Toru Kouyama, Masahiko Hayakawa, Moe Matsuoka, Manabu Yamada, Chikatoshi Honda, Hidehiko Suzuki, Kazuo Yoshioka, Kazunori Ogawa, Hirotaka Sawada, Patrick Michel, Seiji Sugita

      Icarus377   114911 - 114911   5 2022

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.icarus.2022.114911

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    • Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth

      S. Tachibana, H. Sawada, R. Okazaki, Y. Takano, K. Sakamoto, Y. N. Miura, C. Okamoto, H. Yano, S. Yamanouchi, P. Michel, Y. Zhang, S. Schwartz, F. Thuillet, H. Yurimoto, T. Nakamura, T. Noguchi, H. Yabuta, H. Naraoka, A. Tsuchiyama, N. Imae, K. Kurosawa, A. M. Nakamura, K. Ogawa, S. Sugita, T. Morota, R. Honda, S. Kameda, E. Tatsumi, Y. Cho, K. Yoshioka, Y. Yokota, M. Hayakawa, M. Matsuoka, N. Sakatani, M. Yamada, T. Kouyama, H. Suzuki, C. Honda, T. Yoshimitsu, T. Kubota, H. Demura, T. Yada, M. Nishimura, K. Yogata, A. Nakato, M. Yoshitake, A. I. Suzuki, S. Furuya, K. Hatakeda, A. Miyazaki, K. Kumagai, T. Okada, M. Abe, T. Usui, T. R. Ireland, M. Fujimoto, T. Yamada, M. Arakawa, H. C. Connolly, A. Fujii, S. Hasegawa, N. Hirata, N. Hirata, C. Hirose, S. Hosoda, Y. Iijima, H. Ikeda, M. Ishiguro, Y. Ishihara, T. Iwata, S. Kikuchi, K. Kitazato, D. S. Lauretta, G. Libourel, B. Marty, K. Matsumoto, T. Michikami, Y. Mimasu, A. Miura, O. Mori, K. Nakamura-Messenger, N. Namiki, A. N. Nguyen, L. R. Nittler, H. Noda, R. Noguchi, N. Ogawa, G. Ono, M. Ozaki, H. Senshu, T. Shimada, Y. Shimaki, K. Shirai, S. Soldini, T. Takahashi, Y. Takei, H. Takeuchi, R. Tsukizaki, K. Wada, Y. Yamamoto

      Science375 ( 6584 ) 1011 - 1016   4 3 2022

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1126/science.abj8624

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    • Comparative Na and K Mercury and Moon Exospheres

      F. Leblanc, C. Schmidt, V. Mangano, A. Mura, G. Cremonese, J. M. Raines, J. M. Jasinski, M. Sarantos, A. Milillo, R. M. Killen, S. Massetti, T. Cassidy, R. J. Vervack, S. Kameda, M. T. Capria, M. Horanyi, D. Janches, A. Berezhnoy, A. Christou, T. Hirai, P. Lierle, J. Morgenthaler

      Space Science Reviews218 ( 1 )   2 2022

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      Sodium and, in a lesser way, potassium atomic components of surface-bounded exospheres are among the brightest elements that can be observed from the Earth in our Solar System. Both species have been intensively observed around Mercury, the Moon and the Galilean Moons. During the last decade, new observations have been obtained thanks to space missions carrying remote and in situ instrumentation that provide a completely original view of these species in the exospheres of Mercury and the Moon. They challenged our understanding and modelling of these exospheres and opened new directions of research by suggesting the need to better take into account the relationship between the surface-exosphere and the magnetosphere. In this paper, we first review the large set of observations of Mercury and the Moon Sodium and Potassium exospheres. In the second part, we list what it tells us on the sources and sinks of these exospheres focusing in particular on the role of their magnetospheres of these objects and then discuss, in a third section, how these observations help us to understand and identify the key drivers of these exospheres.

      DOI： 10.1007/s11214-022-00871-w

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    • Orbiting experiment of artificial objects deployed from Hayabusa2

      Yusuke Oki, Kent Yoshikawa, Yuto Takei, Hiroshi Takeuchi, Hitoshi Ikeda, Shota Kikuchi, Naoko Ogawa, Takanao Saiki, Yuichi Tsuda, Manabu Yamada, Toru Kouyama, Shingo Kameda

      Hayabusa2 Asteroid Sample Return Mission   313 - 340   2022

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      Publishing type：Part of collection (book)   Publisher：Elsevier  

      DOI： 10.1016/b978-0-323-99731-7.00016-7

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    • Hayabusa2 radio science investigation

      Hitoshi Ikeda, Hiroshi Takeuchi, Shota Kikuchi, Yuya Mimasu, Naoko Ogawa, Kent Yoshikawa, Yuto Takei, Go Ono, Manabu Yamada, Toru Kouyama, Shingo Kameda, Yuichi Tsuda

      Hayabusa2 Asteroid Sample Return Mission   387 - 399   2022

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      Publishing type：Part of collection (book)   Publisher：Elsevier  

      DOI： 10.1016/b978-0-323-99731-7.00019-2

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    • Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets Invited Peer-reviewed

      Kiyoshi Kuramoto, Yasuhiro Kawakatsu, Masaki Fujimoto, Akito Araya, Maria Antonietta Barucci, Hidenori Genda, Naru Hirata, Hitoshi Ikeda, Takeshi Imamura, Jörn Helbert, Shingo Kameda, Masanori Kobayashi, Hiroki Kusano, David J. Lawrence, Koji Matsumoto, Patrick Michel, Hideaki Miyamoto, Tomokatsu Morota, Hiromu Nakagawa, Tomoki Nakamura, Kazunori Ogawa, Hisashi Otake, Masanobu Ozaki, Sara Russell, Sho Sasaki, Hirotaka Sawada, Hiroki Senshu, Shogo Tachibana, Naoki Terada, Stephan Ulamec, Tomohiro Usui, Koji Wada, Sei-ichiro Watanabe, Shoichiro Yokota

      Earth, Planets and Space74 ( 1 )   1 2022

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      DOI： 10.1186/s40623-021-01545-7

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    • Stray light analysis by ray tracing simulation for the wide-angle multiband camera OROCHI onboard the Martian Moons eXploration (MMX) spacecraft

      Ryota Fuse, Keigo Enya, Shingo Kameda, Hiroki Kato, Naoya Osada, Ko Ishibashi, Masanobu Ozaki, Naoya Sakatani, Toru Kouyama, Hidehiko Suzuki, Tomoki Nakamura, Hideaki Miyamoto, Shinsuke Abe, Yuya Goda, Hajime Murao

      Advances in Space Research69 ( 2 ) 1236 - 1248   1 2022

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      DOI： 10.1016/j.asr.2021.11.011

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    • Alignment determination of the Hayabusa2 laser altimeter (LIDAR)

      Hirotomo Noda, Hiroki Senshu, Koji Matsumoto, Noriyuki Namiki, Takahide Mizuno, Seiji Sugita, Shinsuke Abe, Hiroshi Araki, Kazuyoshi Asari, Yuichiro Cho, Atsushi Fujii, Masahiko Hayakawa, Arika Higuchi, Naoyuki Hirata, Naru Hirata, Chikatoshi Honda, Rie Honda, Yoshiaki Ishihara, Shingo Kameda, Shota Kikuchi, Toru Kouyama, Moe Matsuoka, Yuya Mimasu, Tomokatsu Morota, Satoru Nakazawa, Kazunori Ogawa, Naoko Ogawa, Go Ono, Shoko Oshigami, Takanao Saiki, Naoya Sakatani, Sho Sasaki, Hirotaka Sawada, Makoto Shizugami, Hidehiko Suzuki, Tadateru Takahashi, Yuto Takei, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Yuichi Tsuda, Seiitsu Tsuruta, Sei-ichiro Watanabe, Manabu Yamada, Ryuhei Yamada, Tomohiro Yamaguchi, Keiko Yamamoto, Yasuhiro Yokota, Fumi Yoshida, Kent Yoshikawa, Makoto Yoshikawa, Kazuo Yoshioka

      Earth, Planets and Space73 ( 1 )   12 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      DOI： 10.1186/s40623-020-01342-8

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      Other Link： http://link.springer.com/article/10.1186/s40623-020-01342-8/fulltext.html

    • MIRS: an imaging spectrometer for the MMX mission

      Maria Antonietta Barucci, Jean-Michel Reess, Pernelle Bernardi, Alain Doressoundiram, Sonia Fornasier, Michel Le Du, Takahiro Iwata, Hiromu Nakagawa, Tomoki Nakamura, Yves André, Shohei Aoki, Takehiko Arai, Elisa Baldit, Pierre Beck, Jean-Tristan Buey, Elisabet Canalias, Matthieu Castelnau, Sebastien Charnoz, Marc Chaussidon, Fréderic Chapron, Valerie Ciarletti, Marco Delbo, Bruno Dubois, Stephane Gauffre, Thomas Gautier, Hidenori Genda, Rafik Hassen-Khodja, Gilles Hervet, Ryuki Hyodo, Christian Imbert, Takeshi Imamura, Laurent Jorda, Shingo Kameda, Driss Kouach, Toru Kouyama, Takeshi Kuroda, Hiroyuki Kurokawa, Laurent Lapaw, Jeremie Lasue, Laetitia Le Deit, Aurélien Ledot, Cedric Leyrat, Bertrand Le Ruyet, Moe Matsuoka, Frederic Merlin, Hideaki Miyamoto, Frederic Moynier, Napoleon Nguyen Tuong, Kazunori Ogohara, Takahito Osawa, Jérôme Parisot, Laurie Pistre, Benjamin Quertier, Sean N. Raymond, Francis Rocard, Takeshi Sakanoi, Takao M. Sato, Eric Sawyer, Fériel Tache, Sylvain Trémolières, Fuminori Tsuchiya, Pierre Vernazza, Didier Zeganadin

      Earth, Planets and Space73 ( 1 )   12 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      The MMX infrared spectrometer (MIRS) is an imaging spectrometer onboard MMX JAXA mission. MMX (Martian Moon eXploration) is scheduled to be launched in 2024 with sample return to Earth in 2029. MIRS is built at LESIA-Paris Observatory in collaboration with four other French laboratories, collaboration and financial support of CNES and close collaboration with JAXA and MELCO. The instrument is designed to fully accomplish MMX’s scientific and measurement objectives. MIRS will remotely provide near-infrared spectral maps of Phobos and Deimos containing compositional diagnostic spectral features that will be used to analyze the surface composition and to support the sampling site selection. MIRS will also study Mars atmosphere, in particular spatial and temporal changes such as clouds, dust and water vapor.

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      DOI： 10.1186/s40623-021-01423-2

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    • Surface environment of Phobos and Phobos simulant UTPS

      Hideaki Miyamoto, Takafumi Niihara, Koji Wada, Kazunori Ogawa, Hiroki Senshu, Patrick Michel, Hiroshi Kikuchi, Ryodo Hemmi, Tomoki Nakamura, Akiko M. Nakamura, Naoyuki Hirata, Sho Sasaki, Erik Asphaug, Daniel T. Britt, Paul A. Abell, Ronald-Louis Ballouz, Olivier S. Banouin, Nicola Baresi, Maria A. Barucci, Jens Biele, Matthias Grott, Hideitsu Hino, Peng K. Hong, Takane Imada, Shingo Kameda, Makito Kobayashi, Guy Libourel, Katsuro Mogi, Naomi Murdoch, Yuki Nishio, Shogo Okamoto, Yuichiro Ota, Masatsugu Otsuki, Katharina A. Otto, Naoya Sakatani, Yuta Shimizu, Tomohiro Takemura, Naoki Terada, Masafumi Tsukamoto, Tomohiro Usui, Konrad Willner

      Earth, Planets and Space73 ( 1 )   12 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      Abstract

      The Martian Moons eXploration (MMX) mission will study the Martian moons Phobos and Deimos, Mars, and their environments. The mission scenario includes both landing on the surface of Phobos to collect samples and deploying a small rover for in situ observations. Engineering safeties and scientific planning for these operations require appropriate evaluations of the surface environment of Phobos. Thus, the mission team organized the Landing Operation Working Team (LOWT) and Surface Science and Geology Sub-Science Team (SSG-SST), whose view of the Phobos environment is summarized in this paper. While orbital and large-scale characteristics of Phobos are relatively well known, characteristics of the surface regolith, including the particle size-distributions, the packing density, and the mechanical properties, are difficult to constrain. Therefore, we developed several types of simulated soil materials (simulant), such as UTPS-TB (University of Tokyo Phobos Simulant, Tagish Lake based), UTPS-IB (Impact-hypothesis based), and UTPS-S (Simpler version) for engineering and scientific evaluation experiments.

      DOI： 10.1186/s40623-021-01406-3

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      Other Link： https://link.springer.com/article/10.1186/s40623-021-01406-3/fulltext.html

    • Design of telescopic nadir imager for geomorphology (TENGOO) and observation of surface reflectance by optical chromatic imager (OROCHI) for the Martian Moons Exploration (MMX)

      Shingo Kameda, Masanobu Ozaki, Keigo Enya, Ryota Fuse, Toru Kouyama, Naoya Sakatani, Hidehiko Suzuki, Naoya Osada, Hiroki Kato, Hideaki Miyamoto, Atsushi Yamazaki, Tomoki Nakamura, Takaya Okamoto, Takahiro Ishimaru, Peng Hong, Ko Ishibashi, Takeshi Takashima, Ryoya Ishigami, Cheng-Ling Kuo, Shinsuke Abe, Yuya Goda, Hajime Murao, Saori Fujishima, Tsubasa Aoyama, Keiji Hagiwara, Satoko Mizumoto, Noriko Tanaka, Kousuke Murakami, Miho Matsumoto, Kenji Tanaka, Hironobu Sakuta

      Earth, Planets and Space73 ( 1 )   12 2021

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1186/s40623-021-01462-9

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    • Science operation plan of Phobos and Deimos from the MMX spacecraft

      Tomoki Nakamura, Hitoshi Ikeda, Toru Kouyama, Hiromu Nakagawa, Hiroki Kusano, Hiroki Senshu, Shingo Kameda, Koji Matsumoto, Ferran Gonzalez-Franquesa, Naoya Ozaki, Yosuke Takeo, Nicola Baresi, Yusuke Oki, David J. Lawrence, Nancy L. Chabot, Patrick N. Peplowski, Maria Antonietta Barucci, Eric Sawyer, Shoichiro Yokota, Naoki Terada, Stephan Ulamec, Patrick Michel, Masanori Kobayashi, Sho Sasaki, Naru Hirata, Koji Wada, Hideaki Miyamoto, Takeshi Imamura, Naoko Ogawa, Kazunori Ogawa, Takahiro Iwata, Takane Imada, Hisashi Otake, Elisabet Canalias, Laurence Lorda, Simon Tardivel, Stéphane Mary, Makoto Kunugi, Seiji Mitsuhashi, Alain Doressoundiram, Frédéric Merlin, Sonia Fornasier, Jean-Michel Reess, Pernelle Bernardi, Shigeru Imai, Yasuyuki Ito, Hatsumi Ishida, Kiyoshi Kuramoto, Yasuhiro Kawakatsu

      Earth, Planets and Space73 ( 1 )   12 2021

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      Abstract

      The science operations of the spacecraft and remote sensing instruments for the Martian Moon eXploration (MMX) mission are discussed by the mission operation working team. In this paper, we describe the Phobos observations during the first 1.5 years of the spacecraft’s stay around Mars, and the Deimos observations before leaving the Martian system. In the Phobos observation, the spacecraft will be placed in low-altitude quasi-satellite orbits on the equatorial plane of Phobos and will make high-resolution topographic and spectroscopic observations of the Phobos surface from five different altitudes orbits. The spacecraft will also attempt to observe polar regions of Phobos from a three-dimensional quasi-satellite orbit moving out of the equatorial plane of Phobos. From these observations, we will constrain the origin of Phobos and Deimos and select places for landing site candidates for sample collection. For the Deimos observations, the spacecraft will be injected into two resonant orbits and will perform many flybys to observe the surface of Deimos over as large an area as possible.

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      DOI： 10.1186/s40623-021-01546-6

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    • In situ science on Phobos with the Raman spectrometer for MMX (RAX): preliminary design and feasibility of Raman measurements

      Yuichiro Cho, Ute Böttger, Fernando Rull, Heinz-Wilhelm Hübers, Tomàs Belenguer, Anko Börner, Maximilian Buder, Yuri Bunduki, Enrico Dietz, Till Hagelschuer, Shingo Kameda, Emanuel Kopp, Matthias Lieder, Guillermo Lopez-Reyes, Andoni Gaizka Moral Inza, Shoki Mori, Jo Akino Ogura, Carsten Paproth, Carlos Perez Canora, Martin Pertenais, Gisbert Peter, Olga Prieto-Ballesteros, Steve Rockstein, Selene Rodd-Routley, Pablo Rodriguez Perez, Conor Ryan, Pilar Santamaria, Thomas Säuberlich, Friedrich Schrandt, Susanne Schröder, Claudia Stangarone, Stephan Ulamec, Tomohiro Usui, Iris Weber, Karsten Westerdorff, Koki Yumoto

      Earth, Planets and Space73 ( 1 )   12 2021

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      Abstract

      Mineralogy is the key to understanding the origin of Phobos and its position in the evolution of the Solar System. In situ Raman spectroscopy on Phobos is an important tool to achieve the scientific objectives of the Martian Moons eXploration (MMX) mission, and maximize the scientific merit of the sample return by characterizing the mineral composition and heterogeneity of the surface of Phobos. Conducting in situ Raman spectroscopy in the harsh environment of Phobos requires a very sensitive, compact, lightweight, and robust instrument that can be carried by the compact MMX rover. In this context, the Raman spectrometer for MMX (i.e., RAX) is currently under development via international collaboration between teams from Japan, Germany, and Spain. To demonstrate the capability of a compact Raman system such as RAX, we built an instrument that reproduces the optical performance of the flight model using commercial off-the-shelf parts. Using this performance model, we measured mineral samples relevant to Phobos and Mars, such as anhydrous silicates, carbonates, and hydrous minerals. Our measurements indicate that such minerals can be accurately identified using a RAX-like Raman spectrometer. We demonstrated a spectral resolution of approximately 10 cm<sup>−1</sup>, high enough to resolve the strongest olivine Raman bands at ~ 820 and ~ 850 cm<sup>−1</sup>, with highly sensitive Raman peak measurements (e.g., signal-to-noise ratios up to 100). These results strongly suggest that the RAX instrument will be capable of determining the minerals expected on the surface of Phobos, adding valuable information to address the question of the moon’s origin, heterogeneity, and circum-Mars material transport.

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      DOI： 10.1186/s40623-021-01496-z

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    • Spectrally blue hydrated parent body of asteroid (162173) Ryugu

      Eri Tatsumi, Naoya Sakatani, Lucie Riu, Moe Matsuoka, Rie Honda, Tomokatsu Morota, Shingo Kameda, Tomoki Nakamura, Michael Zolensky, Rosario Brunetto, Takahiro Hiroi, Sho Sasaki, Sei’ichiro Watanabe, Satoshi Tanaka, Jun Takita, Cédric Pilorget, Julia de León, Marcel Popescu, Juan Luis Rizos, Javier Licandro, Ernesto Palomba, Deborah Domingue, Faith Vilas, Humberto Campins, Yuichiro Cho, Kazuo Yoshioka, Hirotaka Sawada, Yasuhiro Yokota, Masahiko Hayakawa, Manabu Yamada, Toru Kouyama, Hidehiko Suzuki, Chikatoshi Honda, Kazunori Ogawa, Kohei Kitazato, Naru Hirata, Naoyuki Hirata, Yuichi Tsuda, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Yuto Takei, Hiroshi Takeuchi, Yukio Yamamoto, Tatsuaki Okada, Yuri Shimaki, Kei Shirai, Seiji Sugita

      Nature Communications12 ( 1 )   12 2021

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      <title>Abstract</title>Ryugu is a carbonaceous rubble-pile asteroid visited by the Hayabusa2 spacecraft. Small rubble pile asteroids record the thermal evolution of their much larger parent bodies. However, recent space weathering and/or solar heating create ambiguities between the uppermost layer observable by remote-sensing and the pristine material from the parent body. Hayabusa2 remote-sensing observations find that on the asteroid (162173) Ryugu both north and south pole regions preserve the material least processed by space weathering, which is spectrally blue carbonaceous chondritic material with a 0–3% deep 0.7-µm band absorption, indicative of Fe-bearing phyllosilicates. Here we report that spectrally blue Ryugu’s parent body experienced intensive aqueous alteration and subsequent thermal metamorphism at 570–670 K (300–400 °C), suggesting that Ryugu’s parent body was heated by radioactive decay of short-lived radionuclides possibly because of its early formation 2–2.5 Ma. The samples being brought to Earth by Hayabusa2 will give us our first insights into this epoch in solar system history.

      DOI： 10.1038/s41467-021-26071-8

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    • Hayabusa2 pinpoint touchdown near the artificial crater on Ryugu: Trajectory design and guidance performance

      Shota Kikuchi, Takanao Saiki, Yuto Takei, Fuyuto Terui, Naoko Ogawa, Yuya Mimasu, Go Ono, Kent Yoshikawa, Hirotaka Sawada, Hiroshi Takeuchi, Hitoshi Ikeda, Atsushi Fujii, Seiji Sugita, Tomokatsu Morota, Manabu Yamada, Rie Honda, Yasuhiro Yokota, Naoya Sakatani, Shingo Kameda, Toru Kouyama, Naru Hirata, Naoyuki Hirata, Kei Shirai, Kohei Kitazato, Satoru Nakazawa, Makoto Yoshikawa, Satoshi Tanaka, Koji Wada, Sei-ichiro Watanabe, Yuichi Tsuda

      Advances in Space Research68 ( 8 ) 3093 - 3140   10 2021

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      DOI： 10.1016/j.asr.2021.07.031

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    • Opposition Observations of 162173 Ryugu: Normal Albedo Map Highlights Variations in Regolith Characteristics

      Yasuhiro Yokota, Rie Honda, Eri Tatsumi, Deborah Domingue, Stefan Schröder, Moe Matsuoka, Tomokatsu Morota, Naoya Sakatani, Shingo Kameda, Toru Kouyama, Manabu Yamada, Chikatoshi Honda, Masahiko Hayakawa, Yuichiro Cho, Tatsuhiro Michikami, Hidehiko Suzuki, Kazuo Yoshioka, Hirotaka Sawada, Kazunori Ogawa, Kouki Yumoto, Seiji Sugita

      The Planetary Science Journal2 ( 5 ) 177 - 177   1 10 2021

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      Publishing type：Research paper (scientific journal)   Publisher：American Astronomical Society  

      DOI： 10.3847/psj/ac14ba

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    • Development of image texture analysis technique for boulder distribution measurements: Applications to asteroids Ryugu and Itokawa

      Naoya Tanabe, Yuichiro Cho, Eri Tatsumi, Tatsuki Ebihara, Koki Yumoto, Tatsuhiro Michikami, Hideaki Miyamoto, Tomokatsu Morota, Chikatoshi Honda, Patrick Michel, Katharina Otto, Olivier Barnouin, Kazuo Yoshioka, Hirotaka Sawada, Yasuhiro Yokota, Naoya Sakatani, Masahiro Hayakawa, Rie Honda, Shingo Kameda, Moe Matsuoka, Manabu Yamada, Toru Kouyama, Hidehiko Suzuki, Kazunori Ogawa, Seiji Sugita

      Planetary and Space Science204   105249 - 105249   9 2021

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      DOI： 10.1016/j.pss.2021.105249

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    • Resurfacing processes on asteroid (162173) Ryugu caused by an artificial impact of Hayabusa2's Small Carry-on Impactor

      Rie Honda, Masahiko Arakawa, Yuri Shimaki, Kei Shirai, Yasuhiro Yokota, Toshihiko Kadono, Koji Wada, Kazunori Ogawa, Ko Ishibashi, Naoya Sakatani, Satoru Nakazawa, Minami Yasui, Tomokatsu Morota, Shingo Kameda, Eri Tatsumi, Manabu Yamada, Toru Kouyama, Yuichiro Cho, Moe Matsuoka, Hidehiko Suzuki, Chikatoshi Honda, Masahiko Hayakawa, Kazuo Yoshioka, Naru Hirata, Naoyuki Hirata, Hirotaka Sawada, Seiji Sugita, Takanao Saiki, Hiroshi Imamura, Yasuhiko Takagi, Hajime Yano, Chisato Okamoto, Yuichi Tsuda, Yu-ichi Iijima

      ICARUS366   9 2021

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.icarus.2021.114530

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    • Hayabusa2 extended mission: New voyage to rendezvous with a small asteroid rotating with a short period

      M. Hirabayashi, Y. Mimasu, N. Sakatani, S. Watanabe, Y. Tsuda, T. Saiki, S. Kikuchi, T. Kouyama, M. Yoshikawa, S. Tanaka, S. Nakazawa, Y. Takei, F. Terui, H. Takeuchi, A. Fujii, T. Iwata, K. Tsumura, S. Matsuura, Y. Shimaki, S. Urakawa, Y. Ishibashi, S. Hasegawa, M. Ishiguro, D. Kuroda, S. Okumura, S. Sugita, T. Okada, S. Kameda, S. Kamata, A. Higuchi, H. Senshu, H. Noda, K. Matsumoto, R. Suetsugu, T. Hirai, K. Kitazato, D. Farnocchia, S.P. Naidu, D.J. Tholen, C.W. Hergenrother, R.J. Whiteley, N.A. Moskovitz, P.A. Abell

      Advances in Space Research68 ( 3 ) 1533 - 1555   8 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.asr.2021.03.030

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    • Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body

      N. Sakatani, S. Tanaka, T. Okada, T. Fukuhara, L. Riu, S. Sugita, R. Honda, T. Morota, S. Kameda, Y. Yokota, E. Tatsumi, K. Yumoto, N. Hirata, A. Miura, T. Kouyama, H. Senshu, Y. Shimaki, T. Arai, J. Takita, H. Demura, T. Sekiguchi, T. G. Müller, A. Hagermann, J. Biele, M. Grott, M. Hamm, M. Delbo, W. Neumann, M. Taguchi, Y. Ogawa, T. Matsunaga, T. Wada, S. Hasegawa, J. Helbert, N. Hirata, R. Noguchi, M. Yamada, H. Suzuki, C. Honda, K. Ogawa, M. Hayakawa, K. Yoshioka, M. Matsuoka, Y. Cho, H. Sawada, K. Kitazato, T. Iwata, M. Abe, M. Ohtake, S. Matsuura, K. Matsumoto, H. Noda, Y. Ishihara, K. Yamamoto, A. Higuchi, N. Namiki, G. Ono, T. Saiki, H. Imamura, Y. Takagi, H. Yano, K. Shirai, C. Okamoto, S. Nakazawa, Y. Iijima, M. Arakawa, K. Wada, T. Kadono, K. Ishibashi, F. Terui, S. Kikuchi, T. Yamaguchi, N. Ogawa, Y. Mimasu, K. Yoshikawa, T. Takahashi, Y. Takei, A. Fujii, H. Takeuchi, Y. Yamamoto, C. Hirose, S. Hosoda, O. Mori, T. Shimada, S. Soldini, R. Tsukizaki, M. Ozaki, S. Tachibana, H. Ikeda, M. Ishiguro, H. Yabuta, M. Yoshikawa, S. Watanabe, Y. Tsuda

      Nature Astronomy5 ( 8 ) 766 - 774   8 2021

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1038/s41550-021-01371-7

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    • Phoenix“Hayabusa”: A tale of the future (24) - Ryugu in visible wavelengths ‒

      Tatsumi E., Sugita S., Honda R., Morota T., Kameda S., Cho Y., Sawada H., Yokota Y., Sakatani N., Hayakawa M., Matsuoka M., Yamada M., Kouyama T., Suzuki H., Honda C., Yoshioka K., Ogawa K., Yumoto K.

      Planetary People - The Japanese Society for Planetary Sciences30 ( 2 ) 64 - 71   25 6 2021

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      Language：Japanese   Publisher：The Japanese Society for Planetary Sciences  

      DOI： 10.14909/yuseijin.30.2_64

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    • Correction to: Orbit insertion strategy of Hayabusa2’s rover with large release uncertainty around the asteroid Ryugu (Astrodynamics, (2020), 4, 4, (309-329), 10.1007/s42064-020-0080-y)

      Yusuke Oki, Kent Yoshikawa, Hiroshi Takeuchi, Shota Kikuchi, Hitosi Ikeda, Daniel J. Scheeres, Jay W. McMahon, Junichiro Kawaguchi, Yuto Takei, Yuya Mimasu, Naoko Ogawa, Go Ono, Fuyuto Terui, Manabu Yamada, Toru Kouyama, Shingo Kameda, Kazuya Yoshida, Kenji Nagaoka, Tetsuo Yoshimitsu, Takanao Saiki, Yuichi Tsuda

      Astrodynamics5 ( 2 ) 183   6 2021

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1007/s42064-021-0100-6

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    • High-resolution observations of bright boulders on asteroid Ryugu: 2. Spectral properties

      Chiho Sugimoto, Eri Tatsumi, Yuichiro Cho, Tomokatsu Morota, Rie Honda, Shingo Kameda, Yosuhiro Yokota, Koki Yumoto, Minami Aoki, Daniella N. DellaGiustina, Tatsuhiro Michikami, Takahiro Hiroi, Deborah L. Domingue, Patrick Michel, Stefan E. Schröder, Tomoki Nakamura, Manabu Yamada, Naoya Sakatani, Toru Kouyama, Chikatoshi Honda, Masahiko Hayakawa, Moe Matsuoka, Hidehiko Suzuki, Kazuo Yoshioka, Kazunori Ogawa, Hirotaka Sawada, Masahiko Arakawa, Takanao Saiki, Hiroshi Imamura, Yasuhiko Takagi, Hajime Yano, Kei Shirai, Chisato Okamoto, Yuichi Tsuda, Satoru Nakazawa, Yuichi Iijima, Seiji Sugita

      Icarus   114591 - 114591   6 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.icarus.2021.114591

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    • Improved method of hydrous mineral detection by latitudinal distribution of 0.7-μm surface reflectance absorption on the asteroid Ryugu

      Shingo Kameda, Yasuhiro Yokota, Toru Kouyama, Eri Tatsumi, Marika Ishida, Tomokatsu Morota, Rie Honda, Naoya Sakatani, Manabu Yamada, Moe Matsuoka, Hidehiko Suzuki, Yuichiro Cho, Masahiko Hayakawa, Chikatoshi Honda, Hirotaka Sawada, Kazuo Yoshioka, Kazunori Ogawa, Seiji Sugita

      Icarus360   15 5 2021

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.icarus.2021.114348

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    • Post-arrival calibration of Hayabusa2's optical navigation cameras (ONCs): Severe effects from touchdown events

      Toru Kouyama, Eri Tatsumi, Yasuhiro Yokota, Koki Yumoto, Manabu Yamada, Rie Honda, Shingo Kameda, Hidehiko Suzuki, Naoya Sakatani, Masahiko Hayakawa, Tomokatsu Morota, Moe Matsuoka, Yuichiro Cho, Chikatoshi Honda, Hirotaka Sawada, Kazuo Yoshioka, Seiji Sugita

      Icarus360   15 5 2021

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.icarus.2021.114353

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    • High-resolution observations of bright boulders on asteroid Ryugu: 1. Size frequency distribution and morphology

      Chiho Sugimoto, Eri Tatsumi, Yuichiro Cho, Tomokatsu Morota, Rie Honda, Shingo Kameda, Yosuhiro Yokota, Koki Yumoto, Minami Aoki, Daniella N. DellaGiustina, Tatsuhiro Michikami, Takahiro Hiroi, Deborah L. Domingue, Patrick Michel, Stefan E. Schröder, Tomoki Nakamura, Manabu Yamada, Naoya Sakatani, Toru Kouyama, Chikatoshi Honda, Masahiko Hayakawa, Moe Matsuoka, Hidehiko Suzuki, Kazuo Yoshioka, Kazunori Ogawa, Hirotaka Sawada, Masahiko Arakawa, Takanao Saiki, Hiroshi Imamura, Yasuhiko Takagi, Hajime Yano, Kei Shirai, Chisato Okamoto, Yuichi Tsuda, Satoru Nakazawa, Yuichi Iijima, Seiji Sugita

      Icarus369   114529 - 114529   5 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.icarus.2021.114529

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    • Geologic History and Crater Morphology of Asteroid (162173) Ryugu

      Yuichiro Cho, Tomokatsu Morota, Masanori Kanamaru, Naofumi Takaki, Koki Yumoto, Carolyn M. Ernst, Masatoshi Hirabayashi, Olivier S. Barnouin, Eri Tatsumi, Katharina A. Otto, Nicole Schmitz, Roland J Wagner, Ralf Jaumann, Hideaki Miyamoto, Hiroshi Kikuchi, Ryodo Hemmi, Rie Honda, Shingo Kameda, Yasuhiro Yokota, Toru Kouyama, Hidehiko Suzuki, Manabu Yamada, Naoya Sakatani, Chikatoshi Honda, Masahiko Hayakawa, Kazuo Yoshioka, Moe Matsuoka, Tatsuhiro Michikami, Naru Hirata, Hirotaka Sawada, Kazunori Ogawa, Seiji Sugita

          19 4 2021

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      Publisher：Wiley  

      DOI： 10.1002/essoar.10506689.2

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    • Numerical modeling of lander interaction with a low-gravity asteroid regolith surface

      Florian Thuillet, Yun Zhang, Patrick Michel, Jens Biele, Shingo Kameda, Seiji Sugita, Eri Tatsumi, Stephen R. Schwartz, Ronald-Louis Ballouz

      Astronomy &amp; Astrophysics648   A56 - A56   4 2021

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      Publishing type：Research paper (scientific journal)   Publisher：EDP Sciences  

      Context. The JAXA asteroid sample return mission Hayabusa2 reached its target (162173) Ryugu in June 2018 and released the European (CNES-DLR) lander MASCOT in October 2018. MASCOT successfully landed on the surface, and the Hayabusa2 Optical Navigation Camera system has been able to image parts of the MASCOT trajectory.

      Aims. This work builds on our previous study of interactions between a landing package and a granular material in the context of MASCOT on Ryugu. The purpose is to expand our knowledge on this topic and to help constrain physical properties of surfaces by considering the actual trajectory of MASCOT and observations of Ryugu from Hayabusa2.

      Methods. We ran a new campaign of numerical simulations using the N-body code pkdgrav with the soft-sphere discrete element method by expanding the parameter space to characterize the actual landing scenario of MASCOT on Ryugu. The surface was modeled as a granular medium, but we also considered a large boulder in the bed at various depths and a rigid wall representing a cliff. MASCOT was faithfully modeled as the actual lander, and we considered different impact angles, speeds, and surface slopes. We were particularly interested in the outgoing-to-incoming speed ratio of MASCOT during the landing process.

      Results. We found that a boulder in the bed generally increases both the stochasticity of the outcomes and the speed ratio, with larger increases when the boulder sits closer to the surface. We also found that the surface slope does not affect our previous results and that the impact speed does not affect the speed ratio for moderate-friction granular material. Finally, we found that a speed ratio as low as 0.3, as estimated in the actual scenario, can occur with a solid-rock surface, not only with a soft surface, because the geometry of the lander is nonspherical. This means that we must infer the physical properties of the surface from outcomes such as the speed ratio with caution: it depends on the lander geometry.

      DOI： 10.1051/0004-6361/201936128

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    • Ballistic deployment of the Hayabusa2 artificial landmarks in the microgravity environment of Ryugu

      Shota Kikuchi, Naoko Ogawa, Osamu Mori, Takanao Saiki, Yuto Takei, Fuyuto Terui, Go Ono, Yuya Mimasu, Kent Yoshikawa, Stefaan Van Wal, Hiroshi Takeuchi, Hitoshi Ikeda, Atsushi Fujii, Yuki Takao, Tetsuya Kusumoto, Naru Hirata, Naoyuki Hirata, Kei Shirai, Toru Kouyama, Shingo Kameda, Manabu Yamada, Satoru Nakazawa, Makoto Yoshikawa, Satoshi Tanaka, Seiji Sugita, Sei-ichiro Watanabe, Yuichi Tsuda

      Icarus358   114220 - 114220   4 2021

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.icarus.2020.114220

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    • Spectral characterization of the craters of Ryugu as observed by the NIRS3 instrument on-board Hayabusa2

      Lucie Riu, Cédric Pilorget, Ralph Milliken, Kohei Kitazato, Tomoki Nakamura, Yuichiro Cho, Moe Matsuoka, Seiji Sugita, Masanao Abe, Shuji Matsuura, Makiko Ohtake, Shingo Kameda, Naoya Sakatani, Eri Tatsumi, Yasuhiro Yokota, Takahiro Iwata

      Icarus357   15 3 2021

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.icarus.2020.114253

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    • Crater depth-to-diameter ratios on asteroid 162173 Ryugu d/D of craters on Ryugu

      Rina Noguchi, Naoyuki Hirata, Naru Hirata, Yuri Shimaki, Naoki Nishikawa, Sayuri Tanaka, Takaaki Sugiyama, Tomokatsu Morota, Seiji Sugita, Yuichiro Cho, Rie Honda, Shingo Kameda, Eri Tatsumi, Kazuo Yoshioka, Hirotaka Sawada, Yasuhiro Yokota, Naoya Sakatani, Masahiko Hayakawa, Moe Matsuoka, Manabu Yamada, Toru Kouyama, Hidehiko Suzuki, Chikatoshi Honda, Kazunori Ogawa, Masanori Kanamaru, Sei ichiro Watanabe

      Icarus354   15 1 2021

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.icarus.2020.114016

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    • UVSPEX/WSO-UV for Earth-like exoplanetary oxygen exospheres

      Shingo Kameda, Go Murakami, Alexander Tavrov, Keigo Enya, Mikhail Sachkov, Masahiro Ikoma, Norio Narita, Oleg Korablev

      SPACE TELESCOPES AND INSTRUMENTATION 2020: ULTRAVIOLET TO GAMMA RAY11444   2021

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      Language：English   Publishing type：Research paper (international conference proceedings)  

      DOI： 10.1117/12.2576260

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    • Macroporosity and Grain Density of Rubble Pile Asteroid (162173) Ryugu

      Matthias Grott, Jens Biele, Patrick Michel, Seiji Sugita, Stefan Schroeder, Naoya Sakatani, Wladimir Neumann, Shingo Kameda, Tatsuhiro Michikami, Chikatoshi Honda

      JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS125 ( 12 )   12 2020

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1029/2020JE006519

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    • Orbit insertion strategy of Hayabusa2’s rover with large release uncertainty around the asteroid Ryugu

      Yusuke Oki, Kent Yoshikawa, Hiroshi Takeuchi, Shota Kikuchi, Hitosi Ikeda, Daniel J. Scheeres, Jay W. McMahon, Junichiro Kawaguchi, Yuto Takei, Yuya Mimasu, Naoko Ogawa, Go Ono, Fuyuto Terui, Manabu Yamada, Toru Kouyama, Shingo Kameda, Kazuya Yoshida, Kenji Nagaoka, Tetsuo Yoshimitsu, Takanao Saiki, Yuichi Tsuda

      Astrodynamics4 ( 4 ) 309 - 329   12 2020

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      Publishing type：Research paper (scientific journal)  

      DOI： 10.1007/s42064-020-0080-y

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    • The deep-space multi-object orbit determination system and its application to Hayabusa2’s asteroid proximity operations

      Hiroshi Takeuchi, Kent Yoshikawa, Yuto Takei, Yusuke Oki, Shota Kikuchi, Hitoshi Ikeda, Stefania Soldini, Naoko Ogawa, Yuya Mimasu, Go Ono, Fuyuto Terui, Naoya Sakatani, Manabu Yamada, Toru Kouyama, Shingo Kameda, Takanao Saiki, Yuichi Tsuda

      Astrodynamics4 ( 4 ) 377 - 392   12 2020

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      DOI： 10.1007/s42064-020-0084-7

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      Other Link： http://link.springer.com/article/10.1007/s42064-020-0084-7/fulltext.html

    • Surface roughness of asteroid (162173) Ryugu and comet 67P/Churyumov-Gerasimenko inferred from in-situ observations Peer-reviewed

      K A Otto, K-D Matz, S E Schröder, R Parekh, K Krohn, R Honda, S Kameda, R Jaumann, N Schmitz, K Stephan, S Sugita, E Tatsumi, T-M Ho, A Koncz, F Trauthan, Y Cho, M Hayakawa, C Honda, T Kouyama, M Matsuoka, T Morota, S Mottola, K Ogawa, F Preusker, N Sakatani, H Sawada, F Scholten, H Suzuki, M Yamada, Y Yokota, K Yoshioka

      Monthly Notices of the Royal Astronomical Society500 ( 3 ) 3178 - 3193   27 10 2020

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      Publishing type：Research paper (scientific journal)   Publisher：Oxford University Press (OUP)  

      DOI： 10.1093/mnras/staa3314

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    • Mission Status of Hayabusa2, Science Highlights, and Outlook for Sample Analyses

      Seiji Sugita, Rie Honda, Tomokatsu Morota, Shingo Kameda, Eri Tatsumi, Shogo Tachibana, Kohei Kitazato, Tatsuaki Okada, Noriyuki Namiki, Masahiko Arakawa, Patrick Michel, Deborah Domingue, Satoshi Tanaka, Makoto Yoshikawa, Sei-ichiro Watanabe, Yuichi Tsuda

          8 10 2020

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      Publisher：Copernicus GmbH  

      &amp;lt;p&amp;gt;JAXA&amp;amp;#8217;s Hayabusa2 is a sample-return mission was launched on Dec. 3, 2014 for bringing back first samples from a C-complex asteroid [1,2]. It arrived at asteroid Ryugu on June 27, 2018 and left for Earth on Nov. 13, 2019 after conducting global remote-sensing observations, two touchdown sampling operations, rover deployments, and an artificial impact experiment. We review our science results and update the mission status of Hayabusa2 in this presentation.&amp;amp;#160;&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;The global observations revealed that Ryugu has a top-shaped body with very low density (1.19&amp;amp;#177;0.02 g/cc) [3], spatially uniform Cb-type spectra without strong Fe-rich serpentine absorption at 0.7-um [4], and a weak but significant OH absorption at 2.7 um [5]. Based on these observations, we proposed that Ryugu materials may have experienced aqueous alteration and subsequent thermal metamorphism due to radiogenic heating [4]. However, other scenarios, such as impact-induced thermal metamorphism and extremely primitive carbonaceous materials before extensive alteration, were also considered because there were many new properties of Ryugu whose origins are unclear. Also, numerical calculations show that impact heating can raise the temperatures high enough to dehydrate serpentine at typical collision speed in the asteroid main belt [6]. &amp;amp;#160;&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;Further analysis using high-resolution data obtained at low-altitude descents for both rehearsal and actual touchdown operations as well as the artificial impact experiment by small carryon impactor (SCI) and landers observations the Ryugu surface on allowed us to find out what caused the properties of Ryugu. For example, subtle but distinct latitudinal variation of spectral slope in optical wavelengths found in the initial observations [4] turned out be caused by solar heating or space weathering during orbital excursion toward the Sun and subsequent erosion of the equatorial ridge owing to slowdown in Ryugu&amp;amp;#8217;s spin rate [7]. The SCI impact created a very large (~17 m in crest diameter) crater consistent with gravity-controlled scaling showing that Ryugu surface has very low intra-boulder cohesion and the Ryugu surface is very young and well mixed [8].&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;Furthermore, the MASCOT lander also showed that typical boulders on Ryugu is not covered with a layer of fine regolith [9] and yet possess very low thermal inertia (282+93/-35 MKS) consistent with highly porous structure [10]. This value is consistent with the global values or Ryugu [4, 11], suggesting that the vast majority of boulders on Ryugu are very porous. However, thermal infrared imager (TIR) also found that Ryugu has a number of &amp;amp;#8220;dense boulders&amp;amp;#8221; with high thermal inertia (&amp;gt;600 MKS) consistent with typical carbonaceous chondrites, showing that Ryugu&amp;amp;#8217;s parent body must have had a large enough gravity and pressure to compress the constituent materials [11]. This observation supports that Ryugu originated from a large parent body, such as proto-Polana and proto-Eulalia, which are estimated to be ~100 km in diameter.&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;Some of the dense boulders were also covered by multi-band images of optical navigation camera (ONC-T) and turned out to have C-type spectra with albedos much higher than the Ryugu average [12]. These spectra and albedos are similar to carbonaceous chondrites heated at low temperatures. Although the total mass of these high-albedo boulders on Ryugu is estimated to be very small (&amp;lt; 1%), the spectral and albedo varieties are much greater than the bulk Ryugu surface and approximately follow the dehydration track of carbonaceous chondrites [12]. These spectral match supports that Ryugu materials experienced aqueous alteration and subsequent thermal metamorphism. The dominance of a high-temperature component and scarcity of lower temperature components are consistent with radiogenic heating in a relatively large parent body because large bodies would have only thin low-temperature thermal skin and large volume of high-temperature interior.&amp;amp;#160;&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;If radiogenic heating is really responsible for Ryugu&amp;amp;#8217;s moderate dehydration, this may place a very important constraint on the timing of the formation of Ryugu&amp;amp;#8217;s parent body. Because the radiogenic heat source for most meteorite parent bodies are likely extinct species, such as 26Al, the peak temperature is chiefly controlled by the timing of accretion [13]. Thus, high metamorphism temperatures (several hundred degrees in Celsius) of Ryugu&amp;amp;#8217;s bulk materials inferred from spectral comparison with laboratory heated CM and CI meteorites [4, 12] require Ryugu&amp;amp;#8217;s parent body formed early in the Solar System. Because Ryugu&amp;amp;#8217;s parent body contained substantial amount of water at the time of formation, it must have been formed outside the snowline. Thus, the birth place of Ryugu&amp;amp;#8217;s parent body would be a high-accretion-rate location outside the snowline.&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;Recent high-precision measurements of stable isotopes of meteorites have found that there is a major dichotomy between carbonaceous chondrites (CCs) and some iron meteorites, which formed outside Jupiter&amp;amp;#8217;s orbit, and non-carbonaceous meteorites (NCs), which formed inside Jupiter&amp;amp;#8217;s orbit [e.g., 14]. If Ryugu belongs to CCs, then Ryugu materials could be form near Jupiter, where accretion could occur early. Thus, measurements of stable isotopes of elements, such as Cr, Ti and Mo, of Ryugu samples to be returned to Earth by the end of 2020 would be highly valuable for constraining the original locations of Polana or Eulalia, among the largest C-complex asteroids in the inner main belt.&amp;amp;#160;&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;&amp;lt;strong&amp;gt;Acknowledgements:&amp;lt;/strong&amp;gt; This study was supported by JSPS Core-to-Core program &amp;amp;#8220;International Network of Planetary Sciences&amp;amp;#8221;, CNES, and Univ. Co?te d&amp;amp;#8217;Azur.&amp;amp;#160;&amp;lt;/p&amp;gt;
      &amp;lt;p&amp;gt;&amp;lt;strong&amp;gt;References:&amp;lt;/strong&amp;gt;&amp;amp;#160; [1] Watanabe et al., SSR, 208, 3-16, 2017. [2] Tsuda et at., Acta Astronaut. 91, 356-363, 2013. [3] Watanabe et al., Science, 364, 268-272, 2019. [4] Sugita et al., Science, 364, eaaw0422, 2019. [5] Kitazato et al., Science, 364, 272-275, 2019. [6] Michel et al., Nature Comm., 11, 5184, 2020. [7] Morota et al., Science, 368, 654-659, 2020. [8] Akarawa et al. Science, 368, 67-671, 2020. [9] Jaumann et al. Science, 365, 817-820, 2019.&amp;amp;#160; [10] Grott et al., Nature Astron. 3, 971-976, 2019.&amp;amp;#160; [11] Okada et al., Nature, 579, 518-522, 2020. [12] Sugimoto et al. 51st LPSC, #1770, 2020.&amp;amp;#160; [13] Grimm and McSween, Science, 259, 653-655, 1993.&amp;amp;#160; [14] Kruijer et al., PNAS, 114, 6712-6716, 2017.&amp;amp;#160;&amp;lt;/p&amp;gt;

      DOI： 10.5194/epsc2020-995

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    • Hayabusa2 Landing Site Selection: Surface Topography of Ryugu and Touchdown Safety Peer-reviewed

      Shota Kikuchi, Sei-ichiro Watanabe, Takanao Saiki, Hikaru Yabuta, Seiji Sugita, Tomokatsu Morota, Naru Hirata, Naoyuki Hirata, Tatsuhiro Michikami, Chikatoshi Honda, Yashuhiro Yokota, Rie Honda, Naoya Sakatani, Tatsuaki Okada, Yuri Shimaki, Koji Matsumoto, Rina Noguchi, Yuto Takei, Fuyuto Terui, Naoko Ogawa, Kent Yoshikawa, Go Ono, Yuya Mimasu, Hirotaka Sawada, Hitoshi Ikeda, Chikako Hirose, Tadateru Takahashi, Atsushi Fujii, Tomohiro Yamaguchi, Yoshiaki Ishihara, Tomoki Nakamura, Kohei Kitazato, Koji Wada, Shogo Tachibana, Eri Tatsumi, Moe Matsuoka, Hiroki Senshu, Shingo Kameda, Toru Kouyama, Manabu Yamada, Kei Shirai, Yuichiro Cho, Kazunori Ogawa, Yukio Yamamoto, Akira Miura, Takahiro Iwata, Noriyuki Namiki, Masahiko Hayakawa, Masanao Abe, Satoshi Tanaka, Makoto Yoshikawa, Satoru Nakazawa, Yuichi Tsuda

      Space Science Reviews216 ( 7 )   10 2020

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      DOI： 10.1007/s11214-020-00737-z

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      Other Link： http://link.springer.com/article/10.1007/s11214-020-00737-z/fulltext.html

    • Collisional history of Ryugu’s parent body from bright surface boulders Peer-reviewed

      E. Tatsumi, C. Sugimoto, L. Riu, S. Sugita, T. Nakamura, T. Hiroi, T. Morota, M. Popescu, T. Michikami, K. Kitazato, M. Matsuoka, S. Kameda, R. Honda, M. Yamada, N. Sakatani, T. Kouyama, Y. Yokota, C. Honda, H. Suzuki, Y. Cho, K. Ogawa, M. Hayakawa, H. Sawada, K. Yoshioka, C. Pilorget, M. Ishida, D. Domingue, N. Hirata, S. Sasaki, J. de León, M. A. Barucci, P. Michel, M. Suemitsu, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, S. Kikuchi, T. Yamaguchi, N. Ogawa, G. Ono, Y. Mimasu, K. Yoshikawa, T. Takahashi, Y. Takei, A. Fujii, Y. Yamamoto, T. Okada, C. Hirose, S. Hosoda, O. Mori, T. Shimada, S. Soldini, R. Tsukizaki, T. Mizuno, T. Iwata, H. Yano, M. Ozaki, M. Abe, M. Ohtake, N. Namiki, S. Tachibana, M. Arakawa, H. Ikeda, M. Ishiguro, K. Wada, H. Yabuta, H. Takeuchi, Y. Shimaki, K. Shirai, N. Hirata, Y. Iijima, Y. Tsuda, S. Watanabe, M. Yoshikawa

      Nature Astronomy5 ( 1 ) 39 - 45   21 9 2020

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      Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

      DOI： 10.1038/s41550-020-1179-z

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      Other Link： http://www.nature.com/articles/s41550-020-1179-z

    • Global photometric properties of (162173) Ryugu Peer-reviewed

      E. Tatsumi, D. Domingue, S. Schröder, Y. Yokota, D. Kuroda, M. Ishiguro, S. Hasegawa, T. Hiroi, R. Honda, R. Hemmi, L. Le Corre, N. Sakatani, T. Morota, M. Yamada, S. Kameda, T. Koyama, H. Suzuki, Y. Cho, K. Yoshioka, M. Matsuoka, C. Honda, M. Hayakawa, N. Hirata, N. Hirata, Y. Yamamoto, F. Vilas, N. Takato, M. Yoshikawa, M. Abe, S. Sugita

      Astronomy & Astrophysics639   A83 - A83   7 2020

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      DOI： 10.1051/0004-6361/201937096

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    • Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution Peer-reviewed

      T. Morota, S. Sugita, Y. Cho, M. Kanamaru, E. Tatsumi, N. Sakatani, R. Honda, N. Hirata, H. Kikuchi, M. Yamada, Y. Yokota, S. Kameda, M. Matsuoka, H. Sawada, C. Honda, T. Kouyama, K. Ogawa, H. Suzuki, K. Yoshioka, M. Hayakawa, N. Hirata, M. Hirabayashi, H. Miyamoto, T. Michikami, T. Hiroi, R. Hemmi, O. S. Barnouin, C. M. Ernst, K. Kitazato, T. Nakamura, L. Riu, H. Senshu, H. Kobayashi, S. Sasaki, G. Komatsu, N. Tanabe, Y. Fujii, T. Irie, M. Suemitsu, N. Takaki, C. Sugimoto, K. Yumoto, M. Ishida, H. Kato, K. Moroi, D. Domingue, P. Michel, C. Pilorget, T. Iwata, M. Abe, M. Ohtake, Y. Nakauchi, K. Tsumura, H. Yabuta, Y. Ishihara, R. Noguchi, K. Matsumoto, A. Miura, N. Namiki, S. Tachibana, M. Arakawa, H. Ikeda, K. Wada, T. Mizuno, C. Hirose, S. Hosoda, O. Mori, T. Shimada, S. Soldini, R. Tsukizaki, H. Yano, M. Ozaki, H. Takeuchi, Y. Yamamoto, T. Okada, Y. Shimaki, K. Shirai, Y. Iijima, H. Noda, S. Kikuchi, T. Yamaguchi, N. Ogawa, G. Ono, Y. Mimasu, K. Yoshikawa, T. Takahashi, Y. Takei, A. Fujii, S. Nakazawa, F. Terui, S. Tanaka, M. Yoshikawa, T. Saiki, S. Watanabe, Y. Tsuda

      Science368 ( 6491 ) 654 - 659   8 5 2020

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      Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

      DOI： 10.1126/science.aaz6306

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    • An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime Peer-reviewed

      M. Arakawa, T. Saiki, K. Wada, K. Ogawa, T. Kadono, K. Shirai, H. Sawada, K. Ishibashi, R. Honda, N. Sakatani, Y. Iijima, C. Okamoto, H. Yano, Y. Takagi, M. Hayakawa, P. Michel, M. Jutzi, Y. Shimaki, S. Kimura, Y. Mimasu, T. Toda, H. Imamura, S. Nakazawa, H. Hayakawa, S. Sugita, T. Morota, S. Kameda, E. Tatsumi, Y. Cho, K. Yoshioka, Y. Yokota, M. Matsuoka, M. Yamada, T. Kouyama, C. Honda, Y. Tsuda, S. Watanabe, M. Yoshikawa, S. Tanaka, F. Terui, S. Kikuchi, T. Yamaguchi, N. Ogawa, G. Ono, K. Yoshikawa, T. Takahashi, Y. Takei, A. Fujii, H. Takeuchi, Y. Yamamoto, T. Okada, C. Hirose, S. Hosoda, O. Mori, T. Shimada, S. Soldini, R. Tsukizaki, T. Iwata, M. Ozaki, M. Abe, N. Namiki, K. Kitazato, S. Tachibana, H. Ikeda, N. Hirata, N. Hirata, R. Noguchi, A. Miura

      Science368 ( 6486 ) 67 - 71   3 4 2020

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      The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2’s Small Carry-on Impactor. The impact produced an artificial crater with a diameter &gt;10 meters, which has a semicircular shape, an elevated rim, and a central pit. Images of the impact and resulting ejecta were recorded by the Deployable CAMera 3 for &gt;8 minutes, showing the growth of an ejecta curtain (the outer edge of the ejecta) and deposition of ejecta onto the surface. The ejecta curtain was asymmetric and heterogeneous and it never fully detached from the surface. The crater formed in the gravity-dominated regime; in other words, crater growth was limited by gravity not surface strength. We discuss implications for Ryugu’s surface age.

      DOI： 10.1126/science.aaz1701

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    • The spatial distribution of impact craters on Ryugu Peer-reviewed

      Naoyuki Hirata, Tomokatsu Morota, Yuichiro Cho, Masanori Kanamaru, Sei-ichiro Watanabe, Seiji Sugita, Naru Hirata, Yukio Yamamoto, Rina Noguchi, Yuri Shimaki, Eri Tatsumi, Kazuo Yoshioka, Hirotaka Sawada, Yasuhiro Yokota, Naoya Sakatani, Masahiko Hayakawa, Moe Matsuoka, Rie Honda, Shingo Kameda, Manabu Yamada, Toru Kouyama, Hidehiko Suzuki, Chikatoshi Honda, Kazunori Ogawa, Yuichi Tsuda, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Shota Kikuchi, Tomohiro Yamaguchi, Naoko Ogawa, Go Ono, Yuya Mimasu, Kent Yoshikawa, Tadateru Takahashi, Yuto Takei, Atsushi Fujii, Hiroshi Takeuchi, Tatsuaki Okada, Kei Shirai, Yu-ichi Iijima

      Icarus338   113527 - 113527   3 2020

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      DOI： 10.1016/j.icarus.2019.113527

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    • Scattering mechanism of surface material by thrusting near asteroid

      Maiko Yamakawa, Kentaro Watanabe, Hiroumi Tani, Yusuke Maru, Toshihiro Chujo, Jun Matsumoto, Hikaru Eguchi, Keisuke Michigami, Taro Kawano, Hajime Yano, Shingo Kameda, Shujiro Sawai, Osamu Mori, Yuichi Tsuda

      Proceedings of the International Astronautical Congress, IAC2020-October   2020

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    • Design and reconstruction of the hayabusa2 precision landing on ryugu

      S. Kikuchi, F. Terui, N. Ogawa, T. Saiki, G. Ono, K. Yoshikawa, Y. Takei, Y. Mimasu, H. Ikeda, H. Sawada, T. Morota, N. Hirata, N. Hirata, T. Kouyama, S. Kameda, Y. Tsuda

      Advances in the Astronautical Sciences171   3101 - 3120   2020

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      Publishing type：Research paper (international conference proceedings)  

      DOI： 10.2514/1.A34683

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    • The Hayabusa2 lander MASCOT on the surface of asteroid (162173) Ryugu – Stereo-photogrammetric analysis of MASCam image data Peer-reviewed

      F. Scholten, F. Preusker, S. Elgner, K.-D. Matz, R. Jaumann, M. Hamm, S. E. Schröder, A. Koncz, N. Schmitz, F. Trauthan, M. Grott, J. Biele, T.-M. Ho, S. Kameda, S. Sugita

      Astronomy & Astrophysics632   L5 - L5   12 2019

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      After its release and a descent and bouncing phase, the Hayabusa2 lander MASCOT came to a final rest and MASCOT’s camera MASCam acquired a set of images of the surface of Ryugu. With MASCam’s instantaneous field of view of about 1 mrad, the images provide pixel scales from 0.2 to 0.5 mm pixel<sup>−1</sup> in the foreground and up to 1 cm pixel<sup>−1</sup> for surface parts in the background. Using a stereo-photogrammetric analysis of the MASCam images taken from slightly different positions due to commanded and unintentional movements of the MASCOT lander, we were able to determine the orientation for the different measurement positions. Furthermore, we derived a 3D surface model of MASCOT’s vicinity. Although the conditions for 3D stereo processing were poor due to very small stereo angles, the derived 3D model has about 0.5 cm accuracy in the foreground at 20 cm distance and about 1.5 cm at a distance of 40–50 cm.

      DOI： 10.1051/0004-6361/201936760

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    • The MASCOT landing area on asteroid (162173) Ryugu: Stereo-photogrammetric analysis using images of the ONC onboard the Hayabusa2 spacecraft Peer-reviewed

      F. Preusker, F. Scholten, S. Elgner, K.-D. Matz, S. Kameda, T. Roatsch, R. Jaumann, S. Sugita, R. Honda, T. Morota, E. Tatsumi, Y. Cho, K. Yoshioka, H. Sawada, Y. Yokota, N. Sakatani, M. Hayakawa, M. Matsuoka, M. Yamada, T. Kouyama, H. Suzuki, C. Honda, K. Ogawa

      Astronomy & Astrophysics632   L4 - L4   12 2019

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      DOI： 10.1051/0004-6361/201936759

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    • The descent and bouncing path of the Hayabusa2 lander MASCOT at asteroid (162173) Ryugu Peer-reviewed

      F. Scholten, F. Preusker, S. Elgner, K.-D. Matz, R. Jaumann, J. Biele, D. Hercik, H.-U. Auster, M. Hamm, M. Grott, C. Grimm, T.-M. Ho, A. Koncz, N. Schmitz, F. Trauthan, S. Kameda, S. Sugita, R. Honda, T. Morota, E. Tatsumi, Y. Cho, K. Yoshioka, H. Sawada, Y. Yokota, N. Sakatani, M. Hayakawa, M. Matsuoka, M. Yamada, T. Kouyama, H. Suzuki, C. Honda, K. Ogawa

      Astronomy & Astrophysics632   L3 - L3   12 2019

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      DOI： 10.1051/0004-6361/201936757

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    • Earth as an exoplanet mission concept for a lunar orbiting cubesat Peer-reviewed

      Ana I. Gómez de Castro, Leire Beitia-Antero, Carlos E. Miravet-Fuster, Lorenzo Tarabini, Albert Tomás, Juan C. Vallejo, Ada Canet, Mikhail Sachkov, Shingo Kameda

      Journal of Astronomical Telescopes, Instruments, and Systems5 ( 04 ) 1 - 1   23 10 2019

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      Publishing type：Research paper (scientific journal)   Publisher：SPIE-Intl Soc Optical Eng  

      DOI： 10.1117/1.jatis.5.4.044004

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    • Boulder size and shape distributions on asteroid Ryugu Peer-reviewed

      Tatsuhiro Michikami, Chikatoshi Honda, Hideaki Miyamoto, Masatoshi Hirabayashi, Axel Hagermann, Terunori Irie, Keita Nomura, Carolyn M. Ernst, Masaki Kawamura, Kiichi Sugimoto, Eri Tatsumi, Tomokatsu Morota, Naru Hirata, Takaaki Noguchi, Yuichiro Cho, Shingo Kameda, Toru Kouyama, Yasuhiro Yokota, Rina Noguchi, Masahiko Hayakawa, Naoyuki Hirata, Rie Honda, Moe Matsuoka, Naoya Sakatani, Hidehiko Suzuki, Manabu Yamada, Kazuo Yoshioka, Hirotaka Sawada, Ryodo Hemmi, Hiroshi Kikuchi, Kazunori Ogawa, Sei-ichiro Watanabe, Satoshi Tanaka, Makoto Yoshikawa, Yuichi Tsuda, Seiji Sugita

      Icarus331   179 - 191   10 2019

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      Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

      DOI： 10.1016/j.icarus.2019.05.019

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    • Development of high-efficiency reflective grating by holographic processing for UV exoplanet science Peer-reviewed

      K. Enya, S. Kameda

      Proceedings of the SPIE11116   9 9 2019

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      Language：English   Publishing type：Research paper (international conference proceedings)  

      DOI： 10.1117/12.2532484

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    • Multivariable statistical analysis of spectrophotometry and spectra of (162173) Ryugu as observed by JAXA Hayabusa2 mission Peer-reviewed

      M. Barucci, S. Kameda他

      Astronomy & Astrophysics   23 8 2019

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    • Images from the surface of asteroid Ryugu show rocks similar to carbonaceous chondrite meteorites Peer-reviewed

      R. Jaumann, N. Schmitz, T. M. Ho, S. E. Schröder, K. A. Otto, K. Stephan, S. Elgner, K. Krohn, F. Preusker, F. Scholten, J. Biele, S. Ulamec, C. Krause, S. Sugita, K. D. Matz, T. Roatsch, R. Parekh, S. Mottola, M. Grott, P. Michel, F. Trauthan, A. Koncz, H. Michaelis, C. Lange, J. T. Grundmann, M. Maibaum, K. Sasaki, F. Wolff, J. Reill, A. Moussi-Soffys, L. Lorda, W. Neumann, J. B. Vincent, R. Wagner, J. P. Bibring, S. Kameda, H. Yano, S. Watanabe, M. Yoshikawa, Y. Tsuda, T. Okada, T. Yoshimitsu, Y. Mimasu, T. Saiki, H. Yabuta, H. Rauer, R. Honda, T. Morota, Y. Yokota, T. Kouyama

      Science365 ( 6455 ) 817 - 820   23 8 2019

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      DOI： 10.1126/science.aaw8627

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    • RYUGU'S PARENT-BODY PROCESSES ESTIMATED FROM HAYABUSA2 MULTI-BAND OPTICAL OBSERVATIONS

      Sugita S, Honda R, Morota T, Kameda S, Tatsumi E, Honda C, Yokota Y, Yamada M, Kouyama T, Sakatani N, Suzuki H, Yoshioka K, Cho Y, Matsuoka M, Ogawa K, Domingue D, Miyamoto H, Barnouin O. S, Michel P, Ernst C. M, Hiroi T, Nakamura T, Sawada H, Hayakawa M, Hirata N, Hirata N, Kikuchi H, Hemmi R, Michikami T, Palmer Eric, Gaskell R, Hirabayashi M, Jaumann R, Otto K, Schmitz N, Schroder S. E, Komatsu G, Tanaka S, Shirai K, Yoshikawa M, Watanabe S, Tsuda Y

      METEORITICS & PLANETARY SCIENCE54   .   8 2019

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    • Updated inflight calibration of Hayabusa2's optical navigation camera (ONC) for scientific observations during the cruise phase Peer-reviewed

      Eri Tatsumi, Toru Kouyama, Hidehiko Suzuki, Manabu Yamada, Naoya Sakatani, Shingo Kameda, Yasuhiro Yokota, Rie Honda, Tomokatsu Morota, Keiichi Moroi, Naoya Tanabe, Hiroaki Kamiyoshihara, Marika Ishida, Kazuo Yoshioka, Hiroyuki Sato, Chikatoshi Honda, Masahiko Hayakawa, Kohei Kitazato, Hirotaka Sawada, Seiji Sugita

      Icarus325   153 - 195   6 2019

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      Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier {BV}  

      DOI： 10.1016/j.icarus.2019.01.015

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    • Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu-A spinning top-shaped rubble pile. Peer-reviewed International journal

      S Watanabe, M Hirabayashi, N Hirata, Na Hirata, R Noguchi, Y Shimaki, H Ikeda, E Tatsumi, M Yoshikawa, S Kikuchi, H Yabuta, T Nakamura, S Tachibana, Y Ishihara, T Morota, K Kitazato, N Sakatani, K Matsumoto, K Wada, H Senshu, C Honda, T Michikami, H Takeuchi, T Kouyama, R Honda, S Kameda, T Fuse, H Miyamoto, G Komatsu, S Sugita, T Okada, N Namiki, M Arakawa, M Ishiguro, M Abe, R Gaskell, E Palmer, O S Barnouin, P Michel, A S French, J W McMahon, D J Scheeres, P A Abell, Y Yamamoto, S Tanaka, K Shirai, M Matsuoka, M Yamada, Y Yokota, H Suzuki, K Yoshioka, Y Cho, S Tanaka, N Nishikawa, T Sugiyama, H Kikuchi, R Hemmi, T Yamaguchi, N Ogawa, G Ono, Y Mimasu, K Yoshikawa, T Takahashi, Y Takei, A Fujii, C Hirose, T Iwata, M Hayakawa, S Hosoda, O Mori, H Sawada, T Shimada, S Soldini, H Yano, R Tsukizaki, M Ozaki, Y Iijima, K Ogawa, M Fujimoto, T-M Ho, A Moussi, R Jaumann, J-P Bibring, C Krause, F Terui, T Saiki, S Nakazawa, Y Tsuda

      Science (New York, N.Y.)364 ( 6437 ) 268 - 272   19 4 2019

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      The Hayabusa2 spacecraft arrived at the near-Earth carbonaceous asteroid 162173 Ryugu in 2018. We present Hayabusa2 observations of Ryugu's shape, mass, and geomorphology. Ryugu has an oblate "spinning top" shape, with a prominent circular equatorial ridge. Its bulk density, 1.19 ± 0.02 grams per cubic centimeter, indicates a high-porosity (>50%) interior. Large surface boulders suggest a rubble-pile structure. Surface slope analysis shows Ryugu's shape may have been produced from having once spun at twice the current rate. Coupled with the observed global material homogeneity, this suggests that Ryugu was reshaped by centrifugally induced deformation during a period of rapid rotation. From these remote-sensing investigations, we identified a suitable sample collection site on the equatorial ridge.

      DOI： 10.1126/science.aav8032

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    • The Western Bulge of 162173 Ryugu Formed as a Result of a Rotationally Driven Deformation Process

      Masatoshi Hirabayashi, Eri Tatsumi, Hideaki Miyamoto, Goro Komatsu, Seiji Sugita, Sei Ichiro Watanabe, Daniel J. Scheeres, Olivier S. Barnouin, Patrick Michel, Chikatoshi Honda, Tatsuhiro Michikami, Yuichiro Cho, Tomokatsu Morota, Naru Hirata, Naoyuki Hirata, Naoya Sakatani, Stephen R. Schwartz, Rie Honda, Yasuhiro Yokota, Shingo Kameda, Hidehiko Suzuki, Toru Kouyama, Masahiko Hayakawa, Moe Matsuoka, Kazuo Yoshioka, Kazunori Ogawa, Hirotaka Sawada, Makoto Yoshikawa, Yuichi Tsuda

      Astrophysical Journal Letters874 ( 1 )   20 3 2019

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      DOI： 10.3847/2041-8213/ab0e8b

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    • Surface Physical Condition of Asteroid Ryugu Using Close-up Optical and Thermal Images

      Sakatani, N, Sugita, S, Honda, R, Morota, T, Yamada, M, Kameda, S, Tatsumi, E, Yokota, Y, Kouyama, T, Suzuki, H, Honda, C, Hayakawa, M, Yoshioka, K, Matsuoka, M, Cho, Y, Sawada, H, Ogawa, N, Miura, A, Okada, T, Tanaka, S, Senshu, H, Arai, T, Demura, H, Suko, K, Shimaki, Y, Sekiguchi, T, Takita, J, Fukuhara, T, Taguchi, M, Mueller, T, Hagermann, A, Biele, J, Grott, M, Delbo, M

      50th Lunar and Planetary Science Conference2132   1732 - 1733   3 2019

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    • The Raman spectrometer onboard the MMX rover for Phobos

      Till Hagelschuer, Tomás Belenguer, Ute Böttger, Maximilian Buder, Yuichiro Cho, Enrico Dietz, Michael Gensch, Franziska Hanke, Heinz-Wilhelm Hübers, Shingo Kameda, Emanuel Kopp, Simon Kubitza, Andoni Moral, Carsten Paproth, Martin Pertenais, Gisbert Peter, Kristin Rammelkamp, Pablo Rodriguez, Fernando Rull, Conor Ryan, Thomas Säuberlich, Friedrich Schrandt, Susanne Schröder, Stephan Ulamec, Tomohiro Usui, Roderick Vance

      Proceedings of the International Astronautical Congress, IAC2019-   2019

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    • The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes Peer-reviewed

      Sugita, S., Honda, R., Morota, T., Kameda, S., Sawada, H., Tatsumi, E., Yamada, M., Honda, C., Yokota, Y., Kouyama, T., Sakatani, N., Ogawa, K., Suzuki, H., Okada, T., Namiki, N., Tanaka, S., Iijima, Y., Yoshioka, K., Hayakawa, M., Cho, Y., Matsuoka, M., Hirata, N., Hirata, N., Miyamoto, H., Domingue, D., Hirabayashi, M., Nakamura, T., Hiroi, T., Michikami, T., Michel, P., Ballouz, R.-L., Barnouin, O. S., Ernst, C. M., Schr{\"o}der, S. E., Kikuchi, H., Hemmi, R., Komatsu, G., Fukuhara, T., Taguchi, M., Arai, T., Senshu, H., Demura, H., Ogawa, Y., Shimaki, Y., Sekiguchi, T., M{\"u}ller, T. G., Hagermann, A., Mizuno, T., Noda, H., Matsumoto, K., Yamada, R., Ishihara, Y., Ikeda, H., Araki, H., Yamamoto, K., Abe, S., Yoshida, F., Higuchi, A., Sasaki, S., Oshigami, S., Tsuruta, S., Asari, K., Tazawa, S., Shizugami, M., Kimura, J., Otsubo, T., Yabuta, H., Hasegawa, S., Ishiguro, M., Tachibana, S., Palmer, E., Gaskell, R., Le Corre, L., Jaumann, R., Otto, K., Schmitz, N., Abell, P. A., Barucci, M. A., Zolensky, M. E., Vilas, F., Thuillet, F., Sugimoto, C., Takaki, N., Suzuki, Y., Kamiyoshihara, H., Okada, M., Nagata, K., Fujimoto, M., Yoshikawa, M., Yamamoto, Y., Shirai, K., Noguchi, R., Ogawa, N., Terui, F., Kikuchi, S., Yamaguchi, T., Oki, Y., Takao, Y., Takeuchi, H., Ono, G., Mimasu, Y., Yoshikawa, K., Takahashi, T., Takei, Y., Fujii, A., Hirose, C., Nakazawa, S., Hosoda, S., Mori, O., Shimada, T., Soldini, S., Iwata, T., Abe, M., Yano, H., Tsukizaki, R., Ozaki, M., Nishiyama, K., Saiki, T., Watanabe, S., Tsuda, Y.

      Science364 ( 6437 )   2019

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      DOI： 10.1126/science.aaw0422

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    • The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy Peer-reviewed

      K. Kitazato, R. E. Milliken, T. Iwata, M. Abe, M. Ohtake, S. Matsuura, T. Arai, Y. Nakauchi, T. Nakamura, M. Matsuoka, H. Senshu, N. Hirata, T. Hiroi, C. Pilorget, R. Brunetto, F. Poulet, L. Riu, J. P. Bibring, D. Takir, D. L. Domingue, F. Vilas, M. A. Barucci, D. Perna, E. Palomba, A. Galiano, K. Tsumura, T. Osawa, M. Komatsu, A. Nakato, T. Arai, N. Takato, T. Matsunaga, Y. Takagi, K. Matsumoto, T. Kouyama, Y. Yokota, E. Tatsumi, N. Sakatani, Y. Yamamoto, T. Okada, S. Sugita, R. Honda, T. Morota, S. Kameda, H. Sawada, C. Honda, M. Yamada, H. Suzuki, K. Yoshioka, M. Hayakawa, K. Ogawa, Y. Cho, K. Shirai, Y. Shimaki, N. Hirata, A. Yamaguchi, N. Ogawa, F. Terui, T. Yamaguchi, Y. Takei, T. Saiki, S. Nakazawa, S. Tanaka, M. Yoshikawa, S. Watanabe, Y. Tsuda

      Science364 ( 6437 ) 272 - 275   2019

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      DOI： 10.1126/science.aav7432

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    • Observability of hydrogen-rich exospheres in Earth-like exoplanets Peer-reviewed

      Leonardo A. dos, Santos, Vincent Bourrier, David Ehrenreich, Shingo Kameda

      Astronomy & Astrophysics   28 11 2018

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    • A chemical survey of exoplanets with ARIEL Peer-reviewed

      Giovanna Tinetti, Pierre Drossart, Paul Eccleston, Paul Hartogh, Astrid Heske, Jeremy Leconte, Giusi Micela, Marc Ollivier, Goran Pilbratt, Ludovic Puig, Diego Turrini, Bart Vandenbussche, Paulina Wolkenberg, Jean-Philippe Beaulieu, Lars A. Buchave, Martin Ferus, Matt Griffin, Manuel Guedel, Kay Justtanont, Pierre-Olivier Lagage, Pedro Machado, Giuseppe Malaguti, Michiel Min, Hans Ulrik Norgaard-Nielsen, Mirek Rataj, Tom Ray, Ignasi Ribas, Mark Swain, Robert Szabo, Stephanie Werner, Joanna Barstow, Matt Burleigh, James Cho, Vincent Coude du Foresto, Athena Coustenis, Leen Decin, Therese Encrenaz, Marina Galand, Michael Gillon, Ravit Helled, Juan Carlos Morales, Antonio Garcia Munoz, Andrea Moneti, Isabella Pagano, Enzo Pascale, Giuseppe Piccioni, David Pinfield, Subhajit Sarkar, Franck Selsis, Jonathan Tennyson, Amaury Triaud, Olivia Venot, Ingo Waldmann, David Waltham, Gillian Wright, Jerome Amiaux, Jean-Louis Augueres, Michel Berthe, Naidu Bezawada, Georgia Bishop, Neil Bowles, Deirdre Coffey, Josep Colome, Martin Crook, Pierre-Elie Crouzet, Vania Da Peppo, Isabel Escudero Sanz, Mauro Focardi, Martin Frericks, Tom Hunt, Ralf Kohley, Kevin Middleton, Gianluca Morgante, Roland Ottensamer, Emanuele Pace, Chris Pearson, Richard Stamper, Kate Symonds, Miriam Rengel, Etienne Renotte, Peter Ade, Laura Affer, Christophe Alard, Nicole Allard, Francesca Altieri, Yves Andre, Claudio Arena, Ioannis Argyriou, Alan Aylward, Cristian Baccani, Gaspar Bakos, Marek Banaszkiewicz, Mike Barlow, Virginie Batista, Giancarlo Bellucci, Serena Benatti, Pernelle Bernardi, Bruno Bezard, Maria Blecka, Emeline Bolmont, Bertrand Bonfond, Rosaria Bonito, Aldo S. Bonomo, John Robert Brucato, Allan Sacha Brun, Ian Bryson, Waldemar Bujwan, Sarah Casewell, Bejamin Charnay, Cesare Cecchi Pestellini, Guo Chen, Angela Ciaravella, Riccardo Claudi, Rodolphe Cledassou, Mario Damasso, Mario Damiano, Camilla Danielski, Pieter Deroo, Anna Maria Di Giorgio, Carsten Dominik, Vanessa Doublier, Simon Doyle, Rene Doyon, Benjamin Drummond, Bastien Duong, Stephen Eales, Billy Edwards, Maria Farina, Ettore Flaccomio, Leigh Fletcher, Francois Forget, Steve Fossey, Markus Fraenz, Yuka Fujii, Alvaro Garcia-Piquer, Walter Gear, Herve Geoffray, Jean Claude Gerard, Lluis Gesa, H. Gomez, Rafal Graczyk, Caitlin Griffith, Denis Grodent, Mario Giuseppe Guarcello, Jacques Gustin, Keiko Hamano, Peter Hargrave, Yann Hello, Kevin Heng, Enrique Herrero, Allan Hornstrup, Benoit Hubert, Shigeru Ida, Masahiro Ikoma, Nicolas Iro, Patrick Irwin, Christopher Jarchow, Jean Jaubert, Hugh Jones, Queyrel Julien, Shingo Kameda, Franz Kerschbaum, Pierre Kervella, Tommi Koskinen, Matthijs Krijger, Norbert Krupp, Marina Lafarga, Federico Landini, Emanuel Lellouch, Giuseppe Leto, A. Luntzer, Theresa Rank-Luftinger, Antonio Maggio, Jesus Maldonado, Jean-Pierre Maillard, Urs Mall, Jean-Baptiste Marquette, Stephane Mathis, Pierre Maxted, Taro Matsuo, Alexander Medvedev, Yamila Miguel, Vincent Minier, Giuseppe Morello, Alessandro Mura, Norio Narita, Valerio Nascimbeni, N. Nguyen Tong, Vladimiro Noce, Fabrizio Oliva, Enric Palle, Paul Palmer, Maurizio Pancrazzi, Andreas Papageorgiou, Vivien Parmentier, Manuel Perger, Antonino Petralia, Stefano Pezzuto, Ray Pierrehumbert, Ignazio Pillitteri, Giampaolo Piotto, Giampaolo Pisano, Loredana Prisinzano, Aikaterini Radioti, Jean-Michel Reess, Ladislav Rezac, Marco Rocchetto, Albert Rosich, Nicoletta Sanna, Alexandre Santerne, Giorgio Savini, Gaetano Scandariato, Bruno Sicardy, Carles Sierra, Giuseppe Sindoni, Konrad Skup, Ignas Snellen, Mateusz Sobiecki, Lauriane Soret, Alessandro Sozzetti, A. Stiepen, Antoine Strugarek, Jake Taylor, William Taylor, Luca Terenzi, Marcell Tessenyi, Angelos Tsiaras, C. Tucker, Diana Valencia, Gautam Vasisht, Allona Vazan, Francesc Vilardell, Sabrine Vinatier, Serena Viti, Rens Waters, Piotr Wawer, Anna Wawrzaszek, Anthony Whitworth, Yuk L. Yung, Sergey N. Yurchenko, Maria Rosa Zapatero Osorio, Robert Zellem, Tiziano Zingales, Frans Zwart

      EXPERIMENTAL ASTRONOMY46 ( 1 ) 135 - 209   11 2018

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      DOI： 10.1007/s10686-018-9598-x

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    • Stellar imaging coronagraph and exoplanet coronal spectrometer: two additional instruments for exoplanet exploration onboard the WSO-UV 1.7-m orbital telescope Peer-reviewed

      Alexander Tavrov, Shingo Kameda, Andrey Yudaev, Ilia Dzyuban, Alexander Kiselev, Inna Shashkova, Oleg Korablev, Mikhail Sachkov, Jun Nishikawa, Motohide Tamura, Go Murakami, Keigo Enya, Masahiro Ikoma, Norio Narita

      Journal of Astronomical Telescopes, Instruments, and Systems4 ( 4 )   1 10 2018

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      DOI： 10.1117/1.JATIS.4.4.044001

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    • Evaluation of hydrogen absorption cells for observations of the planetary coronas Peer-reviewed

      M. Kuwabara, M. Taguchi, K. Yoshioka, T. Ishida, N. de Oliveira, K. Ito, S. Kameda, F. Suzuki, I. Yoshikawa

      Review of Scientific Instruments   15 2 2018

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    • Initial products of Akatsuki 1-μm camera Peer-reviewed

      Iwagami, Naomoto, Sakanoi, Takeshi, Hashimoto, George L, Kameda, Shingo他

      Earth, Planets and Space70   11 1 2018

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      DOI： 10.1186/s40623-017-0773-5

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    • Martian Moons eXploration MMX elucidating the formation of habitable planets in the solar system

      Kuramoto K., Morota T., Nagaoka H., Nakagawa H., Nakamura T., Ogawa K., Otake H., Ozaki M., Sasaki S., Senshu H., Tachibana S., Kawakatsu Y., Terada N., Usui T., Wada K., Watanabe S., MMX study team, Fujimoto M., Genda H., Hirata N., Imamura T., Kameda S., Matsumoto K., Miyamoto H.

      Planetary People - The Japanese Society for Planetary Sciences27 ( 3 ) 207 - 215   2018

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      DOI： 10.14909/yuseijin.27.3_207

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    • Initial inflight calibration for Hayabusa2 optical navigation camera (ONC) for science observations of asteroid Ryugu Peer-reviewed

      H. Suzuki, M. Yamada, T. Kouyama, E. Tatsumi, S. Kameda, R. Honda, H. Sawada, N. Ogawa, T. Morota, C. Honda, N. Sakatani, M. Hayakawa, Y. Yokota, Y. Yamamoto, S. Sugita

      ICARUS300   341 - 359   1 2018

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      DOI： 10.1016/j.icarus.2017.09.11

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    • Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction Peer-reviewed

      Kazunori Ogohara, Masahiro Takagi, Shin-ya Murakami, Takeshi Horinouchi, Manabu Yamada, Toru Kouyama, George L. Hashimoto, Takeshi Imamura, Yukio Yamamoto, Hiroki Kashimura, Naru Hirata, Naoki Sato, Atsushi Yamazaki, Takehiko Satoh, Naomoto Iwagami, Makoto Taguchi, Shigeto Watanabe, Takao M. Sato, Shoko Ohtsuki, Tetsuya Fukuhara, Masahiko Futaguchi, Takeshi Sakanoi, Shingo Kameda, Ko-ichiro Sugiyama, Hiroki Ando, Yeon Joo Lee, Masato Nakamura, Makoto Suzuki, Chikako Hirose, Nobuaki Ishii, Takumi Abe

      EARTH PLANETS AND SPACE69   12 2017

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      DOI： 10.1186/s40623-017-0749-5

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    • Ecliptic North-South Symmetry of Hydrogen Geocorona Peer-reviewed

      Kameda, S, Ikezawa, S, Sato, M, Kuwabara, M, Osada, N, Murakami, G, Yoshioka, K, Yoshikawa, I, Taguchi, M, Funase, R, Sugita, S, Miyoshi, Y, Fujimoto, M

      Geophysical Research Letters   9 11 2017

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    • Experimental characterization of elastomeric O-rings as reusable seals for mass spectrometric measurements: Application to in situ K-Ar dating on Mars Peer-reviewed

      Yuichiro Cho, Shingo Kameda, Mamoru Okuno, Misa Horiuchi, Kazuo Shibasaki, Ryo Wagatsuma, Yusuke Aida, Yayoi N. Miura, Kazuo Yoshioka, Ryuji Okazaki, Seiji Sugita

      ADVANCES IN SPACE RESEARCH60 ( 7 ) 1453 - 1462   10 2017

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      DOI： 10.1016/j.asr.2017.07.002

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    • Preflight Calibration Test Results for Optical Navigation Camera Telescope (ONC-T) Onboard the Hayabusa2 Spacecraft Peer-reviewed

      S. Kameda, H. Suzuki, T. Takamatsu, Y. Cho, T. Yasuda, M. Yamada, H. Sawada, R. Honda, T. Morota, C. Honda, M. Sato, Y. Okumura, K. Shibasaki, S. Ikezawa, S. Sugita

      SPACE SCIENCE REVIEWS208 ( 1-4 ) 17 - 31   7 2017

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      DOI： 10.1007/s11214-015-0227-y

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    • IMAGING OBSERVATIONS OF THE HYDROGEN COMA OF COMET 67P/CHURYUMOV-GERASIMENKO IN 2015 SEPTEMBER BY THE PROCYON/LAICA Peer-reviewed

      Yoshiharu Shinnaka, Nicolas Fougere, Hideyo Kawakita, Shingo Kameda, Michael R. Combi, Shota Ikezawa, Ayana Seki, Masaki Kuwabara, Masaki Sato, Makoto Taguchi, Ichiro Yoshikawa

      ASTRONOMICAL JOURNAL153 ( 2 )   2 2017

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      DOI： 10.3847/1538-3881/153/2/76

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    • An Investigation of Elemental Composition of Martian Satellites by Gamma-ray and Neutron Spectrometer

      Nobuyuki Hasebe, Toru Ohta, Yoshiharu Amano, Masayuki Naito, Hiroki Kusano, Hiroshi Nagaoka, Kohei Yoshida, Takuto Adachi, Timothy J. Fagan, Haruyoshi Kuno, Eido Shibamura, Akira Hitachi, José A. Matias Lopes, Jesus Martínez-Frías, Tomoki Nakamura, Shingo Kameda, Yuichiro Cho, Naoki Shirai, Hideaki Miyamoto, Takafumi Niihara, Takashi Mikouchi, Tatsuaki Okada, Yuzuru Karouji

      Proceedings of International Symposium on Radiation Detectors and Their Uses (ISRD2016)   14 11 2016

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      DOI： 10.7566/jpscp.11.040006

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    • An in-situ K-Ar isochron dating method for planetary landers using a spot-by-spot laser-ablation technique Peer-reviewed

      Yuichiro Cho, Seiji Sugita, Yayoi N. Miura, Ryuji Okazaki, Naoyoshi Iwata, Tomokatsu Morota, Shingo Kameda

      PLANETARY AND SPACE SCIENCE128   14 - 29   9 2016

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      DOI： 10.1016/j.pss.2016.05.004

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    • Quantitative Potassium Measurements with Laser-Induced Breakdown Spectroscopy Using Low-Energy Lasers: Application to In Situ K-Ar Geochronology for Planetary Exploration Peer-reviewed

      Cho Y, Horiuchi M, Shibasaki K, Kameda S, Sugita S

      Applied Spectroscopy   8 2016

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    • Studies on Solar System Explorations using DESTINY: the Demonstration and Experiment of Space Technology for Interplanetary Voyage

      IWATA Takahiro, IMAMURA Takeshi, OGOHARA Kazunori, OYAMA Akira, IKENAGA Toshinori, KAWAKATSU Yasuhiro, MURAKAMI Go, EZOE Yuichiro, KAMEDA Shingo, KEIKA Kunihiro, ARAI Tomoko, MATSUURA Shuji, SAIKI Takanao

      TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN14 ( 30 ) Pk_111 - Pk_116   2016

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      Language：English   Publisher：THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES  

      <p>DESTINY: the Demonstration and Experiment of Space Technology for Interplanetary Voyage, which is a candidate mission of Epsilon Launch Vehicle, plans to execute scientific observations using instruments with the mass of up to about 10 kg on the transfer and Halo orbit of the sun to earth Lagrangian point L1/L2 or on the fly-by orbit of near earth objects (NEO). Potential scientific objects include in-situ observation and remote sensing from these space are solar system explorations, such as, the observations of plasma and energetic particles around the terrestrial magnetosphere, inter-planetary and inter-stellar dust, and NEO. It is also considered to be useful for the pilot observations for future infrared, gamma-ray, and cosmic-ray space astronomical telescope in the deep space. Applied missions of DESTINY will be able to go to deep space with higher mass of payloads. Using the Epsilon Launch Vehicle, it will convey instruments of up to 50 kg to the space between Venus and Mars. DESTINY launched by the improved launch vehicle with the power of M-V rocket will carry payloads of up to 200 kg into the orbit of Venus and Mars. In these phases, Explorations for Venus, Mars, and multiple NEO, and astronomical observations from the deep space observatory will be realized by low cost deep space missions.</p>

      DOI： 10.2322/tastj.14.Pk_111

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    • Conceptual Design of an In Situ K-Ar Isochron Dating Instrument for Future Mars Rover Missions, Transactions of the Japan Society for Aeronautical and Space Sciences Peer-reviewed

      Cho, Y, Kameda, S, Miura, Y, Saito, Y, Yokota, S, Kasahara, S, Okazaki, R, Yoshioka, K, Shibasaki, K, Oishi, T, Sugita, S

      Aerospace Technology Japan 2016.14 ( ists30 ) 89 - 94   2016

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      DOI： 10.2322/tastj.14.pk_89

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    • Detectability of hydrous minerals using ONC-T camera onboard the Hayabusa2 spacecraft Peer-reviewed

      S. Kameda, H. Suzuki, Y. Cho, S. Koga, M. Yamada, T. Nakamura, T. Hiroi, H. Sawada, R. Honda, T. Morota, C. Honda, A. Takei, T. Takamatsu, Y. Okumura, M. Sato, T. Yasuda, K. Shibasaki, S. Ikezawa, S. Sugita

      ADVANCES IN SPACE RESEARCH56 ( 7 ) 1519 - 1524   10 2015

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      DOI： 10.1016/j.asr.2015.06.037

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    • High-precision potassium measurements using laser-induced breakdown spectroscopy under high vacuum conditions for in situ K-Ar dating of planetary surfaces Peer-reviewed

      Cho Yuichiro, Sugita Seiji, Kameda Shingo, Miura Yayoi N, Ishibashi Ko, Ohno Sohsuke, Kamata Shunichi, Arai Tomoko, Morota Tomokatst, Namiki Noriyuki, Matsui Takafumi

      SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY106   28 - 35   1 4 2015

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      DOI： 10.1016/j.sab.2015.02.002

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    • An outlook of <i>in-situ</i> geochronology techniques for planetary explorations

      Cho Yuichiro, Miura Yayoi N., Kameda Shingo, Okazaki Ryuji, Morota Tomokatsu, Sugita Seiji

      Chikyukagaku48 ( 4 ) 231 - 243   2014

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      Age is one of the most important observables in planetary science. The ages of geologic events on planets including Mars, however, are estimated with the crater chronology approach, which is largely based on radiometric age data derived from very limited places on the Moon. Obtaining age data for the inner planets, asteroids, or the satellites of the outer planets is essential for accurate understanding of the history of our solar system. Although sample-return missions can achieve this goal, they are technically very challenging and extremely expensive. Thus, <i>in-situ</i> geochronology measurements with one-way lander/rover missions would be very important. This paper reviews (1) primary scientific issues on planetary chronology, such as uncertainties in the crater chronology models on Mars, (2) recent developments for <i>in-situ</i> dating instruments based on K–Ar, Rb–Sr, or Pb–Pb dating methods, (3) <i>in-situ</i> K–Ar age measurements conducted by NASAs Curiosity rover, and (4) the development status of our <i>in-situ</i> K–Ar isochron dating method based on a combination of laser-induced breakdown spectroscopy and quadrupole mass spectrometry for measurements of potassium and argon, respectively. We also discuss perspectives for a future Japanese <i>in-situ</i> geochronology mission to Mars.

      DOI： 10.14934/chikyukagaku.48.231

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      Other Link： https://jlc.jst.go.jp/DN/JLC/20001008379?from=CiNii

    • Plasmaspheric filament: An isolated magnetic flux tube filled with dense plasmas Peer-reviewed

      Go Murakami, Ichiro Yoshikawa, Kazuo Yoshioka, Atsushi Yamazaki, Masato Kagitani, Makoto Taguchi, Masayuki Kikuchi, Shingo Kameda, Masato Nakamura

      Geophysical Research Letters40 ( 2 ) 250 - 254   28 1 2013

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      DOI： 10.1002/grl.50124

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    • Image of the Cold Plasmas around the Earth Observed by Telescope of Extreme Ultraviolet (TEX) onboard KAGUYA: Geoscience from the Moon Peer-reviewed

      Murakami, Go, Yoshikawa, Ichiro, Yamazaki, Atsushi, Yoshioka, Kazuo, Kameda, Shingo, Miyake, Wataru, Taguchi, Makoto, Kikuchi, Masayuki, Nakamura, Masato, Okano, Shoichi

      Transactions of the Japanese Society for Artificial Intelligence8 ( 27 ) Tn_23 - Tn_28   12 2012

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      We have succeeded in imaging of the terrestrial plasmasphere by the Telescope of Extreme Ultraviolet (TEX) aboard Japan's lunar orbiter KAGUYA. The view afforded by the KAGUYA orbit encompasses the plasma distribution in a single exposure, enabling us to examine for the first time the globally-averaged properties of the plasmasphere from the "side" (meridian) perspective. This is the world first image of the plasmasphere from the moon.

      DOI： 10.2322/tastj.8.Tn_23

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    • はやぶさ２搭載の Optical Navigation Camera (ONC) による科学観測

      杉田 精司, 本田 理恵, 亀田 真吾, 諸田 智克, 澤田 弘崇, 本田 親寿, 鈴木 秀彦, 小川 和律, 飯島 祐一, 白井 慶, 中村 良介, 山田 学, ONC サイエンスチーム

      宇宙科学技術連合講演会講演集56   2012

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    • Multi-element analysis technique for in-situ planetary exploration by laser-induced breakdown spectroscopy

      M. Kobayashi, K. Ishibashi, S. Ohno, S. Kameda, K. Wada, H. Senshu, T. Arai, N. Namiki, T. Matsui, Y. Cho, S. Sugita

      2nd International Conference on Space Technology, ICST 2011   2011

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      DOI： 10.1109/ICSpT.2011.6064662

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    • The EXCEED mission Peer-reviewed

      Yoshikawa I, Yoshioka K, Murakami G, Ogawa G, Ueno M, Yamazaki A, Uemizu K, Kameda S, Tsuchiya F, Kagitani M, Terada N, Kasaba Y

      Advances in Geosciences: Volume 25: Planetary Science (PS)   29 - 41   2011

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      DOI： 10.1142/9789814355377_0003

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      Other Link： http://orcid.org/0000-0002-8160-3553

    • Variation in lunar sodium exosphere measured from lunar orbiter SELENE (Kaguya) Peer-reviewed

      M. Kagitani, M. Taguchi, A. Yamazaki, I. Yoshikawa, G. Murakami, K. Yoshioka, S. Kameda, S. Okano

      PLANETARY AND SPACE SCIENCE58 ( 12 ) 1660 - 1664   10 2010

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      DOI： 10.1016/j.pss.2010.07.025

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    • Plasmaspheric EUV images seen from lunar orbit: Initial results of the extreme ultraviolet telescope on board the Kaguya spacecraft Peer-reviewed

      Yoshikawa, I, Murakami, G, Ogawa, G, Yoshioka, K, Obana, Y, Taguchi, M, Yamazaki, A, Kameda, S, Nakamura, M, Kikuchi, M, Kagitani, M, Okano, S, Miyake, W

      Journal of Geophysical Research   27 8 2010

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    • CDR-level structural modelling and optimization of the Mercury Sodium Atmosphere Spectral Imager (MSASI)

      João R. Ricardo, David Rees, Shingo Kameda, Ichiro Yoshikawa

      61st International Astronautical Congress 2010, IAC 201010   8495 - 8507   2010

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    • Observation of the Near-Earth Plasmas by Telescope of Extreme Ultraviolet (TEX) Onboard SELENE: Science from the Moon Peer-reviewed

      Yoshikawa, I, Yamazaki, A, Murakami, G, Ezawa, F, Yoshioka, K, Kameda, S, Miyake, W, Taguchi, M, Kikuchi, M, Nakamura, M, Sakanoi, T, Okano, T

      Transactions of the Japan society for aeronautical and space sciences, space technology Japan7 ( 26 ) 27 - 32   2010

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      Language：English   Publishing type：Research paper (scientific journal)   Publisher：THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES  

      The Upper Atmosphere and Plasma Imager (UPI) was launched in 2007, and went to the moon. From the lunar orbit, two telescopes direct toward the Earth. The moon has no atmosphere, which leads no active emission near the spacecraft, thus we have a high quality image of the near-Earth environment. Moreover the moon orbits the Earth once a month and the Earth is observed from many different directions. This is called a "science from the Moon". The two telescopes are mounted on 2-axis gimbal system, Telescope of Extreme ultraviolet (TEX) and Telescope of Visible light (TVIS). TEX detects the O II (83.4nm) and He II (30.4nm) emissions scattered by ionized oxygen and helium, respectively. The targets of EUV imaging are the polar ionosphere, the polar wind, and the plasmasphere and the inner magnetosphere. The maximum spatial and time resolutions are 0.09 Re and 1 minute, respectively.

      DOI： 10.2322/tstj.7.Tk_27

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    • Extreme ultraviolet spectroscope for exospheric dynamics explore (exceed) Peer-reviewed

      Ichiro Yoshikawa, Kazuo Yoshioka, Go Murakami, Atsushi Yamazaki, Shingo Kameda, Munetaka Ueno, Naoki Terada, Fuminori Tsuchiya, Masato Kagitani, Yasumasa Kasaba

      Advances in Geosciences: Volume 19: Planetary Science (PS)   579 - 592   1 2010

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    • Telescope of Extreme Ultraviolet boarded on KAGUYA: Science from the Moon Peer-reviewed

      Yoshikawa, I, Murakami, G, Ezawa, F, Yoshioka, K, Obana, Y, Taguchi, M, Yamazaki, A, Kameda, S, Nakamura, M, Kikuchi, M, Kagitani, M, Okano, S, Shiokawa, K, Miyake, W

      Advances in Geosciences19   109 - 121   2010

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      DOI： 10.1142/9789812838162_0009

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    • The BepiColombo mission: An outstanding tool for investigating the Hermean environment Peer-reviewed

      A. Milillo, M. Fujimoto, E. Kallio, S. Kameda, F. Leblanc, Y. Narita, G. Cremonese, H. Laakso, M. Laurenza, S. Massetti, S. McKenna-Lawlor, A. Mura, R. Nakamura, Y. Omura, D. A. Rothery, K. Seki, M. Storini, P. Wurz, W. Baumjohann, E. J. Bunce, Y. Kasaba, J. Helbert, A. Sprague

      PLANETARY AND SPACE SCIENCE58 ( 1-2 ) 40 - 60   1 2010

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      DOI： 10.1016/j.pss.2008.06.005

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    • The Mercury sodium atmospheric spectral imager for the MMO spacecraft of Bepi-Colombo Peer-reviewed

      I. Yoshikawa, O. Korablev, S. Kameda, D. Rees, H. Nozawa, S. Okano, V. Gnedykh, V. Kottsov, K. Yoshioka, G. Murakami, F. Ezawa, G. Cremonese

      PLANETARY AND SPACE SCIENCE58 ( 1-2 ) 224 - 237   1 2010

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      DOI： 10.1016/j.pss.2008.07.008

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    • First sequential images of the plasmasphere from the meridian perspective observed by KAGUYA Peer-reviewed

      Go Murakami, Ichiro Yoshikawa, Yuki Obana, Kazuo Yoshioka, Gentaro Ogawa, Atsushi Yamazaki, Masato Kagitani, Makoto Taguchi, Masayuki Kikuchi, Shingo Kameda, Masato Nakamura

      EARTH PLANETS AND SPACE62 ( 4 ) E9 - E12   2010

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      DOI： 10.5047/eps.2010.02.006

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    • Interplanetary dust distribution and temporal variability of Mercury&apos;s atmospheric Na Peer-reviewed

      Shingo Kameda, Ichiro Yoshikawa, Masato Kagitani, Shoichi Okano

      GEOPHYSICAL RESEARCH LETTERS36   8 2009

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      DOI： 10.1029/2009GL039036

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    • Observation of the lunar sodium exposure using UPI-TVIS onboard SELENE (Kaguya) Peer-reviewed

      M. Kagitani, M. Taguchi, A. Yamazaki, I. Yoshikawa, G. Murakami, K. Yoshioka, S. Kameda, F. Ezawa, T. Toyota, S. Okano

      Earth Planet. Space61 ( 1-5 )   2009

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      Language：English   Publishing type：Research paper (scientific journal)  

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    • First optical observation of the Moon&apos;s sodium exosphere from the lunar orbiter SELENE (Kaguya) Peer-reviewed

      M. Kagitani, M. Taguchi, A. Yamazaki, I. Yoshikawa, G. Murakami, K. Yoshioka, S. Kameda, F. Ezawa, T. Toyota, S. Okano

      EARTH PLANETS AND SPACE61 ( 8 ) 1025 - 1029   2009

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      Language：English   Publishing type：Research paper (scientific journal)  

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    • The Upper Atmosphere and Plasma Imager/the Telescope of Visible Light (UPI/TVIS) onboard the Kaguya spacecraft Peer-reviewed

      M. Taguchi, T. Sakanoi, S. Okano, M. Kagitani, M. Kikuchi, M. Ejiri, I. Yoshikawa, A. Yamazaki, G. Murakami, K. Yoshioka, S. Kameda, W. Miyake, M. Nakamura, K. Shiokawa

      EARTH PLANETS AND SPACE61 ( 12 ) XVII - XXIII   2009

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1186/BF03352980

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    • Observation of Mercury's sodium exosphere during the transit on November 9, 2006 Peer-reviewed

      Ichiro Yoshikawa, Junya Ono, Kazuo Yoshioka, Go Murakami, Fukuhiro Ezawa, Shingo Kameda, Satoru Ueno

      PLANETARY AND SPACE SCIENCE56 ( 13 ) 1676 - 1680   11 2008

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.pss.2008.07.026

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    • Attempt to identify a source mechanism of Mercury's sodium exosphere by a spectrometer using Fabry-Perot etalon Peer-reviewed

      I. Yoshikawa, S. Kameda, K. Hikosaka, G. Murakami, D. Rees, H. Nozawa, S. Okano, O. Korablev

      ADVANCES IN SPACE RESEARCH42 ( 7 ) 1172 - 1179   10 2008

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.asr.2007.09.018

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    • Observation of Mercury's sodium tail using Fabry-Perot interferometer Peer-reviewed

      S. Kameda, M. Kagitani, S. Okano, I. Yoshikawa, J. Ono

      ADVANCES IN SPACE RESEARCH41 ( 9 ) 1381 - 1385   2008

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.asr.2007.09.039

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    • Mercury's sodium exosphere explored by the BepiColombo mission Peer-reviewed

      K. Yoshioka, K. Hikosaka, S. Kameda, H. Nozawa, A. Yamazaki, I. Yoshikawa

      ADVANCES IN SPACE RESEARCH41 ( 9 ) 1386 - 1391   2008

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.asr.2007.11.024

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    • Telescope of extreme ultraviolet (TEX) onboard SELENE: science from the Moon Peer-reviewed

      I. Yoshikawa, A. Yamazaki, G. Murakami, K. Yoshioka, S. Kameda, F. Ezawa, T. Toyota, W. Miyake, M. Taguchi, M. Kikuchi, M. Nakamura

      EARTH PLANETS AND SPACE60 ( 4 ) 407 - 416   2008

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1186/BF03352805

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    • Observation of Mercury's sodium exosphere by MSASI in the BepiColombo mission Peer-reviewed

      I. Yoshikawa, S. Kameda, K. Matsuura, K. Hikosaka, G. Murakami, K. Yoshioka, H. Nozawa, D. Rees, S. Okano, H. Misawa, A. Yamazaki, O. Korablev

      PLANETARY AND SPACE SCIENCE55 ( 11 ) 1622 - 1633   9 2007

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.pss.2006.01.010

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    • Time variation in exospheric sodium density on Mercury Peer-reviewed

      S. Kameda, I. Yoshikawa, J. Ono, H. Nozawa

      PLANETARY AND SPACE SCIENCE55 ( 11 ) 1509 - 1517   9 2007

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.pss.2006.10.010

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    • Study of time variation in exospheric sodium density on Mercury

      Shingo Kameda

          22 3 2007

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      Language：English   Publishing type：Doctoral thesis  

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    • Ground-based observations of sodium in Mercuryüfs exosphere

      Kameda, S, Kagitani, M, Ono, J, Nozawa, H, Yoshikawa, I, Okano, S

      36th COSPAR Scientific Assembly. Held 16 - 23 July 2004, in Beijing, China   2384   7 2006

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    • Attempt to identify a source mechanism of Mercury's sodium exosphere by remote-sensing technique

      Yoshikawa, I, Hikosaka, K, Kameda, S, Okano, S, Nozawa, H, Yamazaki, A, Korablev, O, Rees, D

      36th COSPAR Scientific Assembly. Held 16 - 23 July 2004, in Beijing, China   1333   7 2006

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    • Observation of the sodium exosphere from mercury magnetospheric orbiter Peer-reviewed

      Ichiro Yoshikawa, Hiromasa Nozawa, Shingo Kameda, Shoichi Okano, Hiroaki Misawa

      MERCURY, MARS AND SATURN38 ( 4 ) 659 - +   2006

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      Language：English   Publishing type：Research paper (international conference proceedings)  

      DOI： 10.1016/j.asr.2005.05.134

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    • Mercury's Exosphere explored by BepiColombo mission Peer-reviewed

      HIKOSAKA Kentaro, KAMEDA Shingo, NOZAWA Hiromasa, YOSHIOKA Kazuo, YAMAZAKI Atsushi, YOSHIKAWA Ichiro, KASABA Yasumasa

      JAXA research and development reportJAXA-RR-05-021 ( 1 ) 16 - 16   2006

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      Language：Japanese   Publisher：Japan Aerospace Exploration Agency  

      Mercury's Sodium Atmosphere Spectral Imager (MSASI) on BepiColombo is under development. MSASI is a high-dispersion visible spectrometer working in the spectral range around sodium D2 emission using a Fabry-Perot interferometer (FPI). Discoveries of Na, K and Ca from the ground-based observations clearly arise that the regolith of Mercury releases a fraction of its content to the atmosphere. Some processes are proposed up to now as release mechanisms, e.g. (1) Photon-stimulated desorption, (2) Ion sputtering, and (3) Micro-meteoroid impact/vaporization. Here we use 3D Monte Carlo simulation in these cases to describe the images taken by MSASI. We can see specific spatial distributions of the Mercury atmosphere in each process. Therefore we conclude that MSASI can identify the mechanism of the Mercury atmosphere comparing with our simulation result.

      CiNii Article

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    • Observation of the sodium exosphere from mercury magnetospheric orbiter Peer-reviewed

      Ichiro Yoshikawa, Hiromasa Nozawa, Shingo Kameda, Shoichi Okano, Hiroaki Misawa

      ADVANCES IN SPACE RESEARCH38 ( 4 ) 659 - 663   2006

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/j.asr.2005.05.134

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    • Mercury Sodium Atmosphere Spectral Imager (MSASI) Peer-reviewed

      Nozawa, H, I. Yoshikawa, S. Kameda, H. Misawa, S. Okano, M. Taguchi, A. Yamazaki, Y. Kasaba, K. Takamizawa, O. Korablev

      JAXA Research and Development Report5   JAXA-RR-05-007E - 52   2005

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      Language：English   Publishing type：Research paper (bulletin of university, research institution)   Publisher：Japan Aerospace Exploration Agency  

      The Mercury Sodium Atmosphere Spectral Imager (MSASI) on the BepiColombo/Mercury Magnetospheric Orbiter (MMO) is a high-dispersion Fabry-Perot imager. MSASI will address a wealth of fundamental scientific questions pertaining to the Mercury's exosphere. Together, our measurement on the overall scale will provide ample new information on regolith-exospheremagnetosphere coupling as well as new understanding of the dynamics governing the 'surfacebounded exosphere'. It arises quite clearly from continuous ground-based observations that the regolith of Mercury releases a fraction of its content to Mercury's exosphere. Some processes are identified up to now as leading to this ejection. These processes are associated with different energies of ejection, behavior in different regions of Mercury's surface and eject different types of population from the surface. The responsible processes are (1) Chemical sputtering, (2) Thermal desorption, (3) Photon-stimulated desorption, (4) Ion sputtering, and (5) Micro-meteoroid impact/vaporization. Each candidate seems to be fairly operative, but any cannot completely explain phenomena observed from the Earth. Also, the fate of ejecta from the regolith is still unknown. Some are expected to return to the lithosphere, the other are lost to interplanetary space. Circulation of lithospheric sodium atoms via exosphere-magnetosphere might bring a significant change in the composition of surface layer on Mercury. The MSASI measurements clearly and definitely can identify the release mechanism, how exospheric sodium is born from the regolith, and bring comprehensive picture of global circulation of regolith materials. Also, BepiColombo is the first and unique opportunity to study the formation, circulation, maintenance of this surface-bounded exosphere, which is a different type of terrestrial atmosphere. Below we describe in somewhat more detail the primary scientific objectives of MSASI.

      CiNii Article

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    • Development of an extreme ultraviolet imaging spectrometer for the mercury mission Peer-reviewed

      Yoshikawa I, Murachi T, Kameda S, Yamazaki A, Okano S, Nakamura M

      ADVANCES IN MIRROR TECHNOLOGY FOR X-RAY, EUV LITHOGRAPHY, LASER, AND OTHER APPLICATIONS5193   164 - 171   2004

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    • Development of an extreme ultraviolet imaging spectrometer for the BepiColombo mission Peer-reviewed

      Yoshikawa, I, A Yamazaki, T Murachi, S Kameda, H Sagawa, S Okano, T Okada, M Nakamura

      MERCURY, MARS AND SATURN33 ( 12 ) 2195 - 2199   2004

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      Language：English   Publishing type：Research paper (scientific journal)  

      DOI： 10.1016/s0273-1177(03)00446-0

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    • Development of multilayer gratings for spectroscopy of Mercury's atmosphere Peer-reviewed

      Kameda, S, Sagawa, H, Murachi, T, Yamazaki, A, Yoshikawa, I, Nakamura, M

      ISAS Report124 ( 124 ) 1 - 14   9 2003

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      Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)   Publisher：Japan Aerospace Exploration Agency  

      An extreme ultraviolet imaging spectrometer (EUIS) for the Mercury mission is under development. The instrument is designed to measure extreme ultraviolet radiations from the atmosphere of Mercury, which could not be identified by the Mariner 10 mission. In this paper, the performance of a Mo/Si multilayer grating, which is newly developed optics to improve the diffraction efficiency in the EUV, is presented. Two types of grating are fabricated, i.e. mechanical ruling and holographic gratings. The results show;a) Stray light of the holographic grating is less than that of the mechanical ruling grating.b) The efficiency of a Mo/Si multilayer grating is one order higher than that of a gold coated grating.

      CiNii Article

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    • Realization of Satellite around The Asteroid by Hayabusa2 and Its Orbit Analysis

      大木優介, 吉川健人, 竹内央, 池田人, 菊地翔太, 武井悠人, 佐伯孝尚, 津田雄一, 山田学, 神山徹, 亀田真吾

      宇宙科学技術連合講演会講演集(CD-ROM)64th   2020

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    • はやぶさ2SCIによる人工クレーター形成に伴う小惑星リュウグウの再表面化過程

      本田理恵, 荒川政彦, 嶌生有理, 白井慶, 横田康弘, 門野敏彦, 和田浩二, 小川和律, 石橋高, 坂谷尚哉, 中澤暁, 保井みなみ, 諸田智克, 亀田真吾, 巽瑛理, 山田学, 神山徹, 長勇一郎, 松岡萌, 鈴木秀彦, 本田親寿, 早川雅彦, 吉岡和夫, 澤田弘崇, 杉田精司, 平田成, 平田直之

      日本惑星科学会秋季講演会予稿集(Web)2020   2020

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    • Asteroid Tracking Telescopic Camera for Phaethon (TCAP) and Multiband Camera for Phaethon (MCAP) for DESTINY<sup>+</sup> mission

      石橋高, HONG Peng, 岡本尚也, 石丸貴博, 山田学, 奥平修, 荒井朋子, 吉田二美, 亀田真吾, 鍵谷将人, 佐藤峻介, 岩田隆浩, 岡田達明, 高島健

      宇宙科学技術連合講演会講演集(CD-ROM)64th   2020

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    • 火星衛星探査計画MMX:目指す科学とその推進

      倉本圭, 倉本圭, 川勝康弘, 藤本正樹, BIBRING Jean Pierre, LAWRENCE David, 玄田英典, 平田成, 今村剛, 亀田真吾, 松本晃治, 宮本英昭, 諸田智克, 長岡央, 中川広務, 中村智樹, 小川和律, 大嶽久志, 尾崎正伸, 佐々木晶, 千秋博紀, 橘省吾, 橘省吾, 寺田直樹, 臼井寛裕, 和田浩二, 渡邊誠一郎

      日本地球惑星科学連合大会予稿集(Web)2019   2019

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    • 火星衛星探査計画MMXの進展とサイエンス

      倉本圭, 倉本圭, 川勝康弘, 藤本正樹, BIBRING Jean-Pierre, 玄田英典, 平田成, 今村剛, 亀田真吾, LAWRENCE David, 松本晃治, 宮本英昭, 諸田智克, 長岡央, 中川広務, 中村智樹, 小川和律, 大嶽久志, 尾崎正伸, 佐々木晶, 千秋博紀, 橘省吾, 寺田直樹, 臼井寛裕, 和田浩二, 渡邊誠一郎

      日本惑星科学会秋季講演会予稿集(Web)2019   2019

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    • 多バンド可視観測による小惑星リュウグウとベヌーの比較

      杉田精司, 本田理恵, 諸田智克, 亀田真吾, 巽瑛理, 横田康弘, 横田康弘, 山田学, 松岡萌, 長勇一郎, 神山徹, 鈴木秀彦, 坂谷尚哉, 本田親寿, 吉岡和夫, 早川雅彦, 澤田弘崇, 渡邊誠一郎, 津田雄一

      日本惑星科学会秋季講演会予稿集(Web)2019   2019

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    • Asteroid Tracking Telescopic Camera for Phaethon (TCAP) and Multiband Camera for Phaethon (MCAP) for DESTINY<sup>+</sup> mission

      石橋高, 亀田真吾, 鍵谷将人, HONG Peng, 山田学, 奥平修, 荒井朋子, 吉田二美, 石丸貴博, 佐藤峻介, 岡本尚也, 高島健, 岩田隆浩, 岡田達明

      宇宙科学技術連合講演会講演集(CD-ROM)63rd   2019

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    • DESTINY<sup>+</sup>ミッションにおける小惑星3200Phaethonのフライバイ撮像観測

      石橋高, 洪鵬, 石丸貴博, 岡本尚也, 佐藤峻介, 鍵谷将人, 亀田真吾, 荒井朋子, 吉田二美, 山田学, 奥平修, 岩田隆浩, 岡田達明, 高島健

      日本惑星科学会秋季講演会予稿集(Web)2019   2019

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    • リュウグウとメインベルト内帯の低アルベド小惑星族の可視スペクトル比較

      杉田精司, 巽瑛理, 長谷川直, 鈴木雄大, 上吉原弘明, 本田理恵, 亀田真吾, 諸田智克, 本田親寿, 神山徹, 山田学, 早川雅彦, 横田康弘, 坂谷尚哉, 鈴木秀彦, 小川和律, 澤田弘崇

      日本地球惑星科学連合大会予稿集(Web)2018   2018

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    • 火星衛星探査計画MMXとそのサイエンス2018

      倉本圭, 倉本圭, 川勝康弘, 藤本正樹, 玄田英典, 平田成, 今村剛, 亀田真吾, 松本晃治, 宮本英昭, 諸田智克, 長岡央, 中川広務, 中村智樹, 小川和律, 大嶽久志, 尾崎正伸, 佐々木晶, 千秋博紀, 橘省吾, 寺田直樹, 臼井寛裕, 和田浩二, 渡邊誠一郎

      日本惑星科学会秋季講演会予稿集(Web)2018   2018

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    • Landing Operation Working Team activity of the MMX mission

      宮本英昭, 今田高峰, 大槻真嗣, 小川和律, 亀田真吾, 馬場満久, 菊地紘, 坂谷尚哉, 逸見良道, 加藤裕基, 中村智樹, 新原隆史, 和田浩二

      宇宙科学技術連合講演会講演集(CD-ROM)62nd   2018

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    • DESTINY<sup>+</sup>ミッションにおける小惑星3200Phaethonのフライバイ撮像観測

      石橋高, 亀田真吾, 鍵谷将人, 洪鵬, 荒井朋子, 吉田二美, 山田学, 奥平修, 石丸貴博, 佐藤峻介, 岡本尚也, 高島健, 岩田隆浩, 岡田達明

      日本惑星科学会秋季講演会予稿集(Web)2018   2018

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    • 火星エアロキャプチャオービタの検討

      藤田 和央, 畠中 龍太, 西 顕太郎, 池永 敏憲, 鈴木 俊之, 春木 美鈴, 小澤 宇志, 野村 哲史, 臼井 寛裕, 宮本 英昭, 亀田 真吾, Fujita Kazuhisa, Hatakenaka Ryuta, Nishi Kentaro, Ikenaga Toshinori, Suzuki Toshiyuki, Haruki Misuzu, Ozawa Takashi, Nomura Satoshi, Usui Tomohiro, Miyamoto Hirdy, Kameda Singo

      平成29年度宇宙航行の力学シンポジウム = Symposium on Flight Mechanics and Astrodynamics: 2017   12 2017

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      Language：Japanese   Publisher：宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)  

      平成29年度宇宙航行の力学シンポジウム（2017年12月7日-8日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)）, 相模原市, 神奈川県著者人数: 11名資料番号: SA6000124018

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    • Initial In-flight Calibration for Hayabusa2 Optical Navigation Camera (ONC) by using images of the Moon, Earth, Mars, and stars.

      Suzuki Hidehiko, Yamada Manabu, Kouyama Toru, Tatsumi Eri, Kameda Shingo, Honda Rie, Sawada Hirotaka, Ogawa Naoko, Morota Tomokatsu, Honda Chikatoshi, Sakatani Naoya, Hayakawa Masahiko, Yokota Yasuhiro, Yamamoto Yukio, Sugita Seiji

          8 2017

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      Language：English   Publisher：Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)  

      50th ISAS Lunar and Planetary Symposium (August 3-4, 2017. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan

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    • 火星衛星探査計画MMXとそのサイエンス2017

      倉本圭, 川勝康弘, 藤本正樹, 玄田英典, 今村剛, 亀田真吾, 松本晃治, 宮本英昭, 諸田智克, 中村智樹, 小川和律, 尾崎正伸, 佐々木晶, 千秋博紀, 橘省吾, 寺田直樹, 臼井寛裕, 和田浩二, 渡邊誠一郎

      日本惑星科学会秋季講演会予稿集(Web)2017   2017

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    • 月・惑星探査用飛行時間型質量分析装置の開発

      今井優介, 斎藤義文, 横田勝一郎, 笠原慧, 齋藤直昭, 長勇一郎, 三浦弥生, 亀田真吾, 杉田精司

      日本地球惑星科学連合大会予稿集(Web)2017   2017

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    • DESTINY+ミッション搭載用超望遠モノクロカメラ(TCAP)およびマルチバンドカメラ(MCAP)

      石橋高, 亀田真吾, 荒井朋子, 奥平修, 山田学, 石丸貴博, 佐藤峻介, 大槻真嗣, 岩田隆浩, 岡田達明

      日本惑星科学会秋季講演会予稿集(Web)2017   2017

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    • 一番星へ行こう!日本の金星探査機の挑戦その30 〜1 umカメラで金星昼＆夜〜

      岩上直幹, はしもとじょーじ, 澤井健太, 坂野井健, 高木聖子, 亀田真吾

      日本惑星科学会誌「遊星人」26 ( 1 ) 21 - 22   2017

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    • A Report on Earth and Moon Observation by Optical Navigation Cameras (ONC) of Hayabusa2 during the Earth Swing-by

        60   5p   6 9 2016

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    • Science of Mars Moons Exploration mission

        60   5p   6 9 2016

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    • DESTINY⁺による流星群母天体フライバイ計画—Meteor Shower Parent Bodies Fly-by mission with DESTINY⁺

      荒井 朋子, 小林 正規, 千秋 博紀, 石橋 高, 山田 学, 和田 浩二, 石丸 亮, 大塚 勝仁, 伊藤 孝士, 渡部 潤一, 亀田 真吾, 川勝 康弘, Sarli Bruno, 岩田 隆浩, 岡田 達明, 吉川 真, 船瀬 龍, 五十里 哲, 尾崎 直哉, 石黒 正晃, 浦川 聖太郎, 阿部 新助, 小松 睦美, 中村 智樹, 中藤 亜衣子, 中村メッセンジャー 圭子, 三河内 岳, 佐々木 晶, 薮田 ひかる, 廣井 孝弘, 橘 省吾, 木村 宏, 矢野 創, 並木 則行, Ralph Srama, Harald Kruger

      宇宙科学技術連合講演会講演集60   6p   9 2016

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      Language：Japanese   Publisher：日本航空宇宙学会  

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      Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K13604/

    • Development of in-situ elemental composition measurement instrument of future Mars lander

      Kameda Shingo, Horiuchi Misa, Cho Yuichiro, Miura Yayoi, Sugita Seiji, Okazaki Satoshi, Kasahara Satoshi, Yokota Shoichiro, Saito Yoshifumi

          7 2016

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      Language：Japanese   Publisher：Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)  

      49th ISAS Lunar and Planetary Symposium (July 20-21, 2016. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan

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    • An Investigation of Elemental Composition of Martian Satellites by Gamma-ray and Neutron Spectrometer

      HASEBE Nobuyuki, OHTA Toru, AMANO Yoshiharu, NAITO Masayuki, KUSANO Hiroki, NAGAOKA Hiroshi, YOSHIDA Kohei, ADACHI Takuto, FAGAN Timothy J., KUNO Haruyoshi, SHIBAMURA Eido, HITACHI Akira, LOPES Jose A. Matias, MARTINEZ-FRIAS Jesus, NAKAMURA Tomoki, KAMEDA Shingo, CHO Yuichiro, SHIRAI Naoki, MIYAMOTO Hideaki, NIIHARA Takafumi, MIKOUCHI Takashi, OKADA Tatsuaki, KAROUJI Yuzuru

      JPS Conference Proceedings (Web)11   2016

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    • 火星衛星探査ミッションとそのサイエンス

      倉本圭, 藤本正樹, 玄田英典, 今村剛, 亀田真吾, 川勝康弘, 松本晃治, 三桝裕也, 宮本英昭, 諸田智克, 中村智樹, 小川和律, 尾崎正伸, 澤田弘崇, 橘省吾, 寺田直樹, 臼井寛裕, 和田浩二, 渡邊誠一郎

      日本惑星科学会秋季講演会予稿集(Web)2016   2016

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    • 着陸探査用その場元素分析・年代測定装置の開発

      亀田真吾, 堀内美沙, 長勇一郎, 黒川宏之, 臼井寛裕, 三浦弥生, 関根康人, 杉田精司, 岡崎隆司, 笠原慧, 横田庄一郎, 齋藤義文

      日本惑星科学会秋季講演会予稿集(Web)2016   2016

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    • DESTINY<sup>+</sup>による流星群母天体フライバイ計画

      荒井朋子, 小林正規, 千秋博紀, 石橋高, 山田学, 和田浩二, 石丸亮, 大塚勝仁, 伊藤孝士, 渡部潤一, 亀田真吾, 川勝康弘, BRUNO Sarli, 岩田隆浩, 岡田達明, 吉川真, 船瀬龍, 五十里哲, 尾崎直哉, 石黒正晃, 浦川聖太郎, 阿部新助, 小松睦美, 中村智樹, 中藤亜衣子, 中村メッセンジャー圭子, 三河内岳, 佐々木晶, 薮田ひかる, 廣井孝弘, 橘省吾, 木村宏, 矢野創, 並木則行, SRAMA Ralph, KRUEGER Harald

      宇宙科学技術連合講演会講演集(CD-ROM)60th   2016

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    • DESTINY+:小型科学衛星による小惑星Phaethonフライバイミッション

      荒井朋子, 小林正規, 千秋博紀, 和田浩二, 石橋高, 春日敏測, 山田学, 亀田真吾, 大塚勝仁, 渡部潤一, 伊藤孝士, 川勝康弘, BRUNO Sarli, 岩田隆浩, 岡田達明, 吉川真, 中村智樹, 薮田ひかる, 佐々木晶, 小松睦美, 中藤亜衣子, 廣井孝弘, 三河内岳, 浦川聖太郎, 阿部新助, 石黒正晃, 木村宏, 橘省吾, 中村良介, 中村(メッセンジャー)圭子, 佐藤幹哉, SRAMA Ralf, KRUGER Harald

      日本地球惑星科学連合大会予稿集(Web)2016   2016

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    • MMXリモートセンシングによるフォボス分光観測と物質分布推定

      中村智樹, 亀田真吾, 宮本英昭, 長谷部信行, 岡田達明, ロッシュ テッド

      日本惑星科学会秋季講演会予稿集(Web)2016   2016

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    • Phoenix "Hayabusa" : A tale of the future(8)Morphological observation by ONC and dynamical and collisional evolution of NEAs

      Morota T., Sugita S., Sawada H., Honda R., Kameda S.

      Planetary People24 ( 1 ) 48 - 53   3 2015

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    • DESTINYで目指す深宇宙探査の科学

      岩田隆浩, 川勝康弘, 村上豪, 江副祐一郎, 亀田真吾, 桂華邦裕, 荒井朋子, 松浦周二, 佐伯孝尚, 今村剛, 小郷原一智, 大山聖

      宇宙科学技術連合講演会講演集(CD-ROM)59th   2015

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    • 深宇宙探査技術実験機DESTINYによる太陽系探査の検討

      岩田隆浩, 川勝康弘, 村上豪, 江副祐一郎, 亀田真吾, 桂華邦裕, 荒井朋子, 松浦周二, 佐伯孝尚, 今村剛, 小郷原一智

      日本地球惑星科学連合大会予稿集(Web)2015   2015

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    • 火星衛星サンプルリターン計画:火星衛星から探る火星圏の科学目的

      寺田直樹, 関華奈子, 二穴喜文, LEBLANC Francois, 松岡彩子, 横田勝一郎, 齋藤義文, 山崎敦, 亀田真吾, 長勇一郎, 倉本圭

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)138th   2015

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    • 月惑星探査における年代その場計測を目指した開発

      長勇一郎, 芝崎和夫, 梅山未紗子, 大石峻裕, 亀田真吾, 三浦弥生, 吉岡和夫, 齋藤義文, 横田勝一郎, 笠原慧, 吉光徹雄, 岡崎隆司, 大竹真紀子, 諸田智克, 古賀すみれ, 杉田精司

      日本地球惑星科学連合大会予稿集(Web)2015   2015

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    • その場年代測定のための飛行時間型質量分析装置の開発

      大石峻裕, 斎藤義文, 横田勝一郎, 笠原慧, 齋藤直昭, 藤原幸雄, 長勇一郎, 三浦弥生, 亀田真吾, 杉田精司

      日本地球惑星科学連合大会予稿集(Web)2015   2015

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    • 火星衛星から探る火星圏

      寺田直樹, 関華奈子, 二穴喜文, LEBLANC Francois, 松岡彩子, 横田勝一郎, 齋藤義文, 山崎敦, 三浦弥生, 馬上謙一, 岡崎隆司, 中村智樹, 亀田真吾, 長勇一郎

      日本惑星科学会秋季講演会予稿集(Web)2015   2015

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    • 紫外線望遠鏡による系外惑星観測計画の検討状況

      亀田真吾, 池澤祥太, 村上豪, 成田憲保, 生駒大洋, 関根康人, 吉川一朗, 杉田精司

      日本地球惑星科学連合大会予稿集(Web)2015   ROMBUNNO.PCG32‐13 (WEB ONLY)   2015

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    • 地球外気圏に関する観測的研究

      桑原正輝, 吉岡和夫, 村上豪, 土屋史紀, 木村智樹, 亀田真吾, 佐藤允基, 吉川一朗

      日本地球惑星科学連合大会予稿集(Web)2015   ROMBUNNO.PCG32‐P11 (WEB ONLY)   2015

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    • 紫外線望遠鏡による系外惑星観測の検討

      堀越寛己, 池澤祥太, 桑原正輝, 村上豪, 亀田真吾, 吉川一朗, 田口真

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)138th   ROMBUNNO.R009‐P34   2015

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    • P2-37 火星探査におけるK-Ar年代測定対象試料の検討(ポスターセッション2,ポスター発表)

      三浦 弥生, 長 勇一郎, 杉田 精司, 亀田 真吾

      日本惑星科学会秋期講演会予稿集2014   "P2 - 37"   10 9 2014

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    • P2-38 K-Ar年代その場計測法の開発 : アイソクロンデータの詳細解析(ポスターセッション2,ポスター発表)

      長 勇一郎, 亀田 真吾, 三浦 弥生, 杉田 精司

      日本惑星科学会秋期講演会予稿集2014   "P2 - 38"   10 9 2014

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    • P2-39 K-Ar年代測定のための、真空紫外LIBSを用いたArイオン輝線検出実験(ポスターセッション2,ポスター発表)

      芝崎 和夫, 奥村 裕, 長 勇一郎, 亀田 真吾, 三部 賢治, 三浦 弥生, 杉田 精司

      日本惑星科学会秋期講演会予稿集2014   "P2 - 39"   10 9 2014

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    • P1-32 1999 JU3の衝突確率とクレーター年代学関数の構築(ポスターセッション1,ポスター発表)

      安藤 滉祐, 諸田 智克, 杉田 精司, 本田 理恵, 亀田 真吾, 山田 学, 本田 親寿, 鈴木 秀彦, 渡邊 誠一郎

      日本惑星科学会秋期講演会予稿集2014   "P1 - 32"   10 9 2014

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    • O14-02 Explorations for the Solar System using DENSITY : Demonstration and Experiment of Space Technology for Interplanetary Voyage

      Iwata Takahiro

      Abstracts Fall Meeting of the Japanese Society for Planetary Sciences2014   "O14 - 02"   10 9 2014

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    • LIBS-TOFMS instrument suite for in-situ geochronology experiments on Mars

      Cho Yuichiro, Kameda Shingo, Miura Yayoi N., Saito Yoshifumi, Yokota Shoichiro, Kasahara Satoshi, Okazaki Ryuji, Sugita Seiji

          8 2014

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      47th ISAS Lunar and Planetary Symposium (August 4-6, 2014. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan

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    • DESTINY応用:小惑星Phaethonフライバイミッション

      荒井朋子, 小林正規, 春日敏測, 大塚勝仁, 川勝康弘, BRUNO Sarli, 渡部潤一, 伊藤孝士, 中村智樹, 中村良介, 中村メッセンジャー 圭子, 小松睦美, 中藤亜衣子, 三河内岳, 亀田真吾, 中宮賢樹, 阿部新助, 浦川聖太郎, 千秋博紀, 和田浩二, 大野宗佑, 石橋高, 石丸亮, 木村宏, SRAMA Ralph, KRUEGER Harald

      宇宙科学技術連合講演会講演集(CD-ROM)58th   2014

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    • ジオコロナ撮像装置LAICAの開発状況

      佐藤允基, 亀田真吾, 桑原正輝, 池澤祥太, 田口真, 吉川一朗, 船瀬龍, 川勝康弘

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)136th   2014

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    • 深宇宙探査技術実験機DESTINYによる太陽系科学

      岩田隆浩, 川勝康弘, 江副祐一郎, 亀田真吾, 桂華邦裕, 村上豪, 今村剛, 安藤紘基, 小郷原一智

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)136th   2014

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    • HISAKI/EXCEEDで観測された磁気嵐中・ジオコロナのLyman‐αの増光

      桑原正輝, 吉岡和夫, 村上豪, 土屋史紀, 木村智樹, 亀田真吾, 佐藤允基, 吉川一朗

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)136th   ROMBUNNO.S001‐11   2014

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    • O9-14 超小型深宇宙探査機搭載用ジオコロナ撮像装置の開発(口頭発表セッション9(はやぶさ),口頭発表)

      佐藤 允基, 亀田 真吾, 田口 真, 吉川 一朗, 中村 正人

      日本惑星科学会秋期講演会予稿集2013   "O9 - 14"   20 11 2013

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    • O9-09 はやぶさ2の試料採取地点の決定に向けた隕石反射分光実験(口頭発表セッション9(はやぶさ),口頭発表)

      武井 亮斗, 佐藤 允基, 古賀 すみれ, 長 勇一郎, 鈴木 秀彦, 亀田 真吾, 杉田 精司

      日本惑星科学会秋期講演会予稿集2013   "O9 - 09"   20 11 2013

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    • O12-02 真空紫外LIBSによるK-Ar年代測定方法の検証(口頭発表セッション12(分析・実験),口頭発表)

      奥村 裕, 大石 峻裕, 芝崎 和夫, 長 勇一郎, 亀田 真吾, 三浦 弥生, 三部 賢治, 杉田 精司

      日本惑星科学会秋期講演会予稿集2013   "O12 - 02"   20 11 2013

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    • P3-12 月・水星・小惑星のナトリウム大気(ポスターセッション3,ポスター発表)

      亀田 真吾, 布施川 綾花, 鈴木 秀彦, 鍵谷 将人, 杉田 精司

      日本惑星科学会秋期講演会予稿集2013   "P3 - 12"   20 11 2013

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    • DESTINY派性機による小惑星Phaethon探査

      荒井朋子, 春日敏測, 大塚勝仁, 中村智樹, 中藤亜衣子, 中村良介, 渡部潤一, 伊藤孝士, 小林正規, 川勝康弘, BRUNO Sarli, MESSENJA-NAKAMURA Keiko, 小松睦美, 三河内岳, 亀田真吾, 中宮賢樹, 千秋博紀, 和田浩二, 大野宗佑, 石橋高, 石丸亮, SRAMA Ralph, KRUEGER Harald

      宇宙科学技術連合講演会講演集(CD-ROM)57th   2013

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    • 1999 JU<sub>3</sub>の可視分光観測と「はやぶさ2」分光観測への展望

      杉田精司, 黒田大介, 亀田真吾, 長谷川直, 鎌田俊一, 廣井孝弘, 安部正直, 石黒正晃, 高遠徳尚, 吉川真

      スペースガード研究 ( 5 )   2013

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    • O3-03 Science observations with Optical Navigation Camera (ONG) onboard Hayabusa2

      Abstracts Fall Meeting of the Japanese Society for Planetary Sciences2012   29 - 29   24 10 2012

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    • P1-11 惑星探査機搭載に向けたLIBSの開発(ポスターセッション1,ポスター発表)

      坂本 進, 奥村 祐, 前田 憲吾, 亀田 真吾, 石橋 高, 並木 則行, 荒井 朋子, 小林 正規

      日本惑星科学会秋期講演会予稿集2012   106 - 106   24 10 2012

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    • P1-08 SELENE-2月探査ローバ搭載用LIBSの設計・開発(ポスターセッション1,ポスター発表)

      亀田 真吾, 石橋 高, 小林 正規, 並木 則行, 荒井 朋子, 坂本 進, 奥村 裕, 前田 憲吾

      日本惑星科学会秋期講演会予稿集2012   103 - 103   24 10 2012

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    • Elemental analyzer for lunar and planetary landed exploration : Laser-Induced Breakdown Spectrometer (LIBS)

      ISHIBASHI K., KAMEDA S.

      Planetary People21 ( 3 ) 260 - 266   25 9 2012

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    • Lunar and planetary chronological missions based on the in-situ geochronology instruments(<Special issue>Planetary exploration in a coming decade activity: Reports of 2nd stage) Peer-reviewed

      Cho Y, Morota T, Miura Y. N, Kameda S

      Planetary People21 ( 3 ) 267 - 275   25 9 2012

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    • A mission proposal for asteroid Phaethon (Special issue: Planetary exploration in a coming decade activity: Reports of 2nd stage)

      Arai T., Kasuga T., Ohtsuka K., Nakamura T., Nakato A., Nakamura R., Ito T., Watanabe J., Kobayashi M., Kawakatsu Y., Nakamura K., Komatsu M., Senshu H., Wada K., Kameda S., Ohno S., Ishibashi K., Ishimaru R., Nakamiya M.

      Planetary People - The Japanese Society for Planetary Sciences21 ( 3 ) 239 - 246   2012

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      DOI： 10.14909/yuseijin.21.3_239

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    • S35-05P レーザー誘起絶縁破壊分光法(LIBS)による鉱物の分類と定量 : 月鉱物のその場測定に向けて(一般ポスターセッション3,ポスター発表)

      石橋 高, 荒井 朋子, 和田 浩二, 小林 正規, 大野 宗祐, 千秋 博紀, 竝木 則行, 松井 孝典, 亀田 真吾, 長 勇一郎, 杉田 精司

      日本惑星科学会秋期講演会予稿集2011   153 - 153   23 10 2011

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    • S21-01 Evidence of a meteoroid impact or variability of solar wind flux in Mercury's sodium tail

      Abstracts Fall Meeting of the Japanese Society for Planetary Sciences2011   36 - 36   23 10 2011

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    • 「かぐや」による子午面撮像が明らかにしたプラズマポーズの形成

      村上豪, 吉川一朗, 吉岡和夫, 山崎敦, 鍵谷将人, 田口真, 菊池雅行, 亀田真吾, 中村正人

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)130th   ROMBUNNO.B006-P009   2011

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    • 115 Interplanetary dust distribution and temporal variability of Mercury's sodium density

      Abstracts Fall Meeting of the Japanese Society for Planetary Sciences2010   15 - 15   6 10 2010

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    • 301 真空環境下でのレーザー誘起絶縁破壊分光装置(LIBS)の定量精度(オーラルセッション7 衝突・破壊過程)

      石橋 高, 大野 宗祐, 亀田 真吾, 荒井 朋子, 小林 正規, 和田 浩二, 千秋 博紀, 後藤 和久, 竝木 則行, 松井 孝典, 長 勇一郎, 杉田 精司

      日本惑星科学会秋期講演会予稿集2010   52 - 52   6 10 2010

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    • 317 BepiColombo Euro-Japan Joint mission to Mercury

      Hayakawa Hajime, Ogawa Hiroyuki, Minesugi Kenji, Takashima Takeshi, Matsuoka Ayako, Nakazawa Satoru, Kameda Shingo, Yamakawa Hiroshi, Kasaba Yasumasa

      Abstracts Fall Meeting of the Japanese Society for Planetary Sciences2009   28 9 2009

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    • BepiColombo/MMO搭載用ナトリウム大気光カメラMSASIの開発

      亀田真吾, 江沢福紘, 村上豪, 小川源太郎, 野澤宏大, 吉川一朗, 岡野章一, KORABLEV O, REES D

      太陽系科学シンポジウム29th   9 - 11   3 2008

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    • Performance test of Image Intensifier used in the BepiColombo mission

      OGAWA Gentaro, MURAKAMI Go, EZAWA Fukuhiro, KAMEDA Shingo, YOSHIKAWA Ichiro

      JAXA research and development report7   1 - 12   2 2008

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      The Mercury&#039;s Sodium Atmosphere Spectral Imager (MSASI) on Mercury Magnetospheric Orbiter (MMO)/ BepiColombo is under development. MSASI is a high-dispersion spectrometer working in the spectral range around sodium D 2 emission. The detector unit employs an Image Intensifier which has twostage micro channel plate (MCP). In this paper, we report the results of performance test for the Image Intensifier. We have focused on the following points. 1. Spectral resolution. 2. Dependency of Dark-Counts on temperature. 3. Radiation tolerance of phosphor (P 46). 4. Tolerance for aging against incident flux.

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    • BepiColombo水星探査計画に向けたナトリウム大気撮像カメラ用検出器の開発

      江沢福紘, 村上豪, 吉岡和夫, 小川源太郎, 亀田真吾, 吉川一朗

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)124th   ROMBUNNO.B009-P017   2008

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    • 水星大気密度変動の地上観測

      亀田真吾, 小川源太郎, 江沢福紘, 村上豪, 吉岡和夫, 吉川一朗

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)124th   ROMBUNNO.B009-09   2008

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    • 小型宇宙望遠鏡TOPSによる水星・金星・火星流出大気観測の科学目標

      寺田直樹, 山崎敦, 三澤浩昭, 土屋史紀, 上野宗孝, 亀田真吾, 二穴喜文, 横田勝一郎, 渡部重十, 吉川一朗

      日本天文学会年会講演予稿集2007   2007

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    • 小型宇宙望遠鏡TOPSによる惑星電磁圏領域の科学目標

      土屋史紀, 寺田直樹, 山崎敦, 今井一雅, 深沢圭一郎, 二穴喜文, 鍵谷将人, 亀田真吾, 笠羽康正, 三澤浩昭, 森岡昭, 野澤宏大, 荻野竜樹, 佐藤毅彦, 垰千尋, 上野宗孝, 横田勝一郎, 吉川一朗, 渡部重十, 高橋幸弘

      地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM)122nd   ROMBUNNO.B009-P028   2007

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    • Development of Mo/Si Multi-Layer Grating for Extreme Ultra-Violet Spectrograph

      Murachi Tetsunori, Kanao Miho, Kameda Shingo, Yamazaki Atsushi, Yoshikawa Ichiro, Nakamura Masato

      JAXA research and development report3   1 - 11   3 2004

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      One of the methods to research the escaping atmosphere is to observe the resonance-scattered light from the escaping particles. Especially, the escaping H, He and O particles resonantly scatter extreme ultraviolet (EUV) lights (H I: 121.6 nm, He I: 58.4 nm, He II: 30.4 nm, O II: 83.4 nm). Therefore, it is important to develope the optics for EUV. In addition, imaging observation is necessary to observe the temporal variation of the escaping atmosphere. In this method, the optics consist of the bandpass filters and the multilayer-coated mirror for EUV. And the optics were loaded onto the satellites and rockets, and observed EUV. With these optics the demerit is non spectrum observation, in other words, single optics can detect single wavelength of EUV. Therefore plural optics using filters and mirror or the spectroscope are necessary to observe the plural particles simultaneously. But the demerit of spectroscope is much more loss of light than that with filters and mirror.This time we produce the the Mo/Si multilayer-coated gratings for EUV light : 30.4nm, and evaluate their performance. We evaporate on the gratings with top layer of Si: 5.0 nm and 20 pairs of Mo: 4.4nm and Si: 13.3 nm. By Atomic Force Microscope, we verify that the grooves of the multilayer gratings are not buried. In addition, maximum reflective efficiency of multilayer blazed grating is 2.2 %, that of multilayer laminar grating is 2.9 %. By multilayer technology, reflective efficiency of multilayer grating exceeded approximately 5 times higher than that of Pt monolayer grating.

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    Research Projects

    • Observation of upper atmospheres of terrestrial explanet using UV high-dispersion spectroscopy

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

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      4 2024 - 3 2028

      Grant number：24H00276

      Grant amount：\49010000 （ Direct Cost: \37700000 、 Indirect Cost：\11310000 ）

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    • 太陽系外地球型惑星の水環境進化

      科学研究費助成事業 

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      4 2018 - 3 2023

      Grant type：Competitive

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    • 太陽系外地球型惑星の高層大気観測に向けた高感度紫外線検出器の開発

      日本学術振興会  科学研究費助成事業 

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      4 2019 - 3 2022

      Grant type：Competitive

      Grant amount：\18400000 （ Direct Cost: \12880000 、 Indirect Cost：\5520000 ）

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    • 強紫外線輻射を受ける地球型惑星のハビタビリティ

      自然科学研究機構  アストロバイオロジーセンター サテライト研究 

      亀田真吾

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      4 2018 - 3 2021

      Authorship：Principal investigator  Grant type：Competitive

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    • 高感度紫外線分光器の開発

      文部科学省  JAXA戦略的基礎開発予算 

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      4 2019 - 3 2020

      Grant type：Competitive

      Grant amount：\9100000 （ Direct Cost: \8200000 、 Indirect Cost：\900000 ）

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    • 宇宙望遠鏡搭載に向けた系外惑星観測用真空紫外線分光システムの検討

      宇宙航空研究開発機構  JAXA戦略的基礎開発予算 

      亀田真吾

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      4 2018 - 3 2019

      Authorship：Principal investigator  Grant type：Competitive

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    • 紫外線宇宙望遠鏡による太陽系外惑星大気の研究

      日本学術振興会  科学研究費助成事業 

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      4 2016 - 3 2019

      Grant type：Competitive

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    • WSO-UV搭載用紫外線分光器とコロナグラフ装置の開発

      宇宙航空研究開発機構  JAXA国際共同ミッション推進研究 

      亀田真吾

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      10 2017 - 3 2018

      Authorship：Principal investigator  Grant type：Competitive

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    • MMX搭載望遠/広角分光カメラの機器性能試験手法および設備の開発

      宇宙航空研究開発機構  受託研究（一般受託研究） 

      亀田真吾

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      4 2017 - 3 2018

      Authorship：Principal investigator  Grant type：Competitive

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    • Investigation of solar panels system planets by visible and infrared high-dispersion spectroscopy on small/medium-sized telescopes at Haleakala, Hawaii

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      Kasaba Yasumasa

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      4 2015 - 3 2018

      Grant number：15H05209

      Grant amount：\14300000 （ Direct Cost: \11000000 、 Indirect Cost：\3300000 ）

      In cooperation with Univ. Hawaii, we established the operation of 40 cm Schmidt (T40: visible) and 60 cm Cassegrain (T60: visible/infrared) at the top of Haleakala, Hawaii. We attached our infrared/visible spectrometers developed by us, and run T40 and T60 as the telescopes dedicated to solar system planets. They acted as a part of the international observation network supporting to JAXA UV/EUV space telescope 'Hisaki' and NASA Juno (Jupiter), ESA Mars Express, NASA MAVEN, ESA ExoMars Trace Gas Orbiter (Mars), JAXA Akatsuki (Venus), and (Jupiter). We utilized those unique observational tools and achieved the investigations for Jupiter (Io torus structures and links to the magnetosphere, auroral structure and short-time fluctuations), Mars (upper atmospheric temperature and velocity fields, lower atmospheric trace gases), etc.

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    • Basic Development of an in-situ Age Measurement System for Planetary Surfaces

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      Sugita Seiji, MOROTA TOMOKATSU, OKAZAKI RYUJI, CHO YUICHIRO

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      4 2014 - 3 2017

      Grant number：26247092

      Grant amount：\41730000 （ Direct Cost: \32100000 、 Indirect Cost：\9630000 ）

      In this study, we conducted basic development of K-Ar age measurement system for future Mars lander. We developed time-of-flight mass spectrometer, pulse laser unit including optics, spectrometer unit, laser irradiation unit including rock sample handing system, and operation protocols for the entire system. In particular we conducted a field test in Izu Island with a test rover unit and our K-Ar measurement system. The results of our research strongly suggest that the basic specifications of our K-Ar measurement system can meet the requirements for size, weight, shock, and vibration for a rover that Japanese science community is planning for near-future Mars missions.

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    • 光検出器を用いた年代計測装置の開発

      宇宙航空研究開発機構  JAXA搭載機器基礎開発実験費 

      亀田真吾

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      4 2015 - 3 2016

      Authorship：Principal investigator  Grant type：Competitive

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    • 超小型深宇宙機搭載観測機器の開発

      宇宙航空研究開発機構  共同研究（国内共同研究） 

      亀田真吾

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      10 2013 - 3 2015

      Authorship：Principal investigator  Grant type：Competitive

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    • Visible and infrared high dispersion spectroscopic investigation of the solar system planets in the Hawaii Haleakala observatory

      Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research 

      KASABA Yasumasa, SAKANOI Takeshi, MURATA Isao, NAKAGAWA Hiromu, KAGITANI Masato, OKANO Shoichi, YOSHIKAWA Ichiro, YAMAZAKI Atsushi, KAMEDA Shingo, TAO Chihiro, YONEDA Mizuki

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      4 2012 - 3 2015

      Grant number：24403007

      Grant amount：\17680000 （ Direct Cost: \13600000 、 Indirect Cost：\4080000 ）

      We Tohoku Univ. have operated 40cm telescope at Mt. Haleakala of Maui Island by the cooperation with Univ. Hawaii. Utilizing its wide FOV and high dispersion spectroscopic capabilities, we investigated (1) the origin of the variations of Herman sodium atmosphere (with NASA/MESSENGER orbiter), (2) the effects of Io torus to Jovian magnetospheric activities (with JAXA/Hisaki EUV space telescope). We also investigated following targets by related telescope and satellites; (3) the search of escaping atmospheres of Venus and Mars (by Hisaki); (4) the study of velocity field and trace gas elements in the upper atmosphere of Venus (at Kitt Peak, Hida, and Haleakala), and (5) the search of crust origin gas (H2O/HDO, CH4) in the Martian atmosphere (at Manua Kea, Haleakala). Moreover, at the Haleakala observatory, (6) we moved 60cm telescope from Iitate, Fukushima (first light: fall 2014), and constructed the 2m telescope (first light: the end of 2016) under the collaboration with Univ. Hawaii.

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    • 真空紫外分光によるK-Ar年代測定

      宇宙航空研究開発機構  JAXA搭載機器基礎開発実験費 

      亀田真吾

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      4 2012 - 4 2013

      Authorship：Principal investigator  Grant type：Competitive

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    • 水星大気光観測による磁気圏と固体表面の相互作用に関する研究

      科学研究費補助金 

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      4 2011 - 3 2013

      Grant type：Competitive

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    • 惑星大気光観測用ファブリペロー干渉計の開発

      宇宙航空研究開発機構  JAXA搭載機器基礎開発実験費 

      亀田真吾

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      4 2010 - 3 2011

      Authorship：Principal investigator  Grant type：Competitive

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    • 月惑星大気光の超高分散分光観測に向けたファブリペロー干渉計用高精度平面鏡の開発

      科学研究費補助金 

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      4 2008 - 3 2010

      Grant type：Competitive

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    Industrial property rights

    • インターライン型ＣＣＤイメージセンサ及びこれを用いて移動体を撮像する方法

      亀田真吾

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      Application no：特願2020-181074  Date applied：29 10 2020

      Announcement no：特開2022-71936  Date announced：17 5 2022

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    • 光学機器に使用するための鏡をプレートに接着させる方法

      亀田真吾, 佐藤允基, 池澤祥太

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      Application no：2015-028424  Date applied：17 2 2015

      Announcement no：2016-150967  Date announced：22 8 2016

      Patent/Registration no：6562341  Date issued：2 8 2019

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    • Ｋ－Ａｒ年代測定装置及び方法

      亀田真吾

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      Application no：特願2012-126314  Date applied：1 6 2012

      Patent/Registration no：特許5930460  Date registered：13 5 2016 

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