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Asteroid Ryugu before the Hayabusa2 encounter [PDF]
Progress in Earth and Planetary Science, 2018 Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA).Koji Wada, Matthias Grott, Patrick Michel, Kevin J. Walsh, Antonella M. Barucci, Jens Biele, Jürgen Blum, Carolyn M. Ernst, Jan Thimo Grundmann, Bastian Gundlach, Axel Hagermann, Maximilian Hamm, Martin Jutzi, Myung-Jin Kim, Ekkehard Kührt, Lucille Le Corre, Guy Libourel, Roy Lichtenheldt, Alessandro Maturilli, Scott R. Messenger, Tatsuhiro Michikami, Hideaki Miyamoto, Stefano Mottola, Thomas Müller, Akiko M. Nakamura, Larry R. Nittler, Kazunori Ogawa, Tatsuaki Okada, Ernesto Palomba, Naoya Sakatani, Stefan E. Schröder, Hiroki Senshu, Driss Takir, Michael E. Zolensky, International Regolith Science Group (IRSG) in Hayabusa2 project +34 moredoaj +14 more sourcesPresolar Stardust in Asteroid Ryugu
The Astrophysical Journal Letters, 2022 International audienceWe have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission.Nakazawa, Satoru, Daisuke Wakabayashi, Bradley T. De Gregorio, Kleine, Thorsten, Miho Shigenaka, Okumura, Taiga, Laurent Remusat, Haolan Tang, Dazzi, Alexandre, Tsuda, Yuichi, Yogata, Kasumi, Martin Bizzarro, Dauphas, Nicolas, Akiko Miyazaki, Okada, Tatsuaki, Mckeegan, Kevin D., Tafla, Lauren, Deniset-Besseau, Ariane, Sachiko Amari, Jérôme Aléon, Thorsten Kleine, Quirico, Eric, Shintaro Komatani, Russell, Sara S., Ai-Cheng Zhang, Peter Hoppe, Saiki, Takanao, Larry R. Nittler, Noriko T. Kita, Morihiko Onose, Duprat, Jean, A. L. David Kilcoyne, Kilcoyne, A. L. David, Ikshu Gautam, Kevin D. McKeegan, Wadhwa, Meenakshi, Bajo, Ken Ichi, Aléon, Jérôme, Shohei Yamashita, Liping Qin, Naoya Sakamoto, Abe, Yoshinari, Watanabe, Sei-Ichiro, Makiko K. Haba, Kitajima, Kouki, Tsuyoshi Iizuka, Yuri Amelin, Ryota Fukai, Usui, Tomohiro, Kouki Kitajima, Edward D. Young, Itoh, Shoichi, Shoichi Itoh, Yusuke Tamenori, Masahiro Nishimura, Okazaki, Ryuji, Naraoka, Hiroshi, Walker, Richard J., Kebukawa, Yoko, Yokoyama, Tetsuya, Miyazaki, Akiko, Nishimura, Masahiro, Yoko Kebukawa, Moynier, Frédéric, Takaaki Noguchi, Marc Chaussidon, Alexander, Conel M. O'D, Liu, Ming Chang, Motoo Ito, Hoppe, Peter, Kanami Kamide, Yoshinari Abe, Liu, Ming-Chang, Tanaka, Satoshi, Jens Barosch, Remusat, Laurent, Amelin, Yuri, Hibiya, Yuki, Onose, Morihiko, Suga, Hiroki, Fukai, Ryota, Takahashi, Yoshio, Ann N. Nguyen, Mathurin, Jérémie, Dartois, Emmanuel, Mayu Morita, Montagnac, Gilles, Tommaso Di Rocco, Huss, Gary R., Martins, Zita, Changkun Park, Yasuo Takeichi, Takanao Saiki, Richard J. Walker, George D. Cody, Cécile Engrand, Engrand, Cécile, Akira Ishikawa, Sandford, Scott A., Rhonda M. Stroud, Hidaka, Hiroshi, Satoru Nakazawa, Alexandre Dazzi, Sakamoto, Naoya, Kamide, Kanami, Hiroshi Naraoka, Takuji Ohigashi, Bajo, Ken-Ichi, Gilles Montagnac, Kasumi Yogata, Wada, Sohei, Yada, Toru, Tatsuaki Okada, Nakai, Izumi, Hisayoshi Yurimoto, Terui, Fuyuto, Schönbächler, Maria, Choi, Byeon Gak, Conel, Conel M., Ryuji Okazaki, Lauren Tafla, Abe, Masanao, Morita, Mayu, Alexander N. Krot, Wataru Fujiya, Motomura, Kazuko, Minako Hashiguchi, Shigekazu Yoneda, Bejach, Laure, Nakato, Aiko, Gautam, Ikshu, Maximilien Verdier-Paoletti, Krot, Alexander N., Jean Duprat, Terada, Kentaro, Yoneda, Shigekazu, Conel M. O’D. Alexander, Carlson, Richard W., Emmanuel Dartois, Shogo Tachibana, Jianhua Wang, Kiyohiro Ichida, Sohei Wada, Bouvier, Audrey, Bizzarro, Martin, Nakamura, Tomoki, Scott A. Sandford, Noriyuki Kawasaki, Zhang, Ai-Cheng, Yuichi Tsuda, Komatsu, Mutsumi, Terada, Yasuko, Verdier-Paoletti, Maximilien, Wang, Jianhua, Lydie Bonal, Komatani, Shintaro, Richard W. Carlson, Shigenaka, Miho, Gary R. Huss, Tang, Haolan, Yoshio Takahashi, Qing-Zhu Yin, Qin, Liping, Nicolas Dauphas, Nittler, Larry R., Cody, George D., Kawasaki, Noriyuki, Maria Schönbächler, Yin, Qing-Zhu, Davis, Andrew M., Iizuka, Tsuyoshi, Alexander, Conel M. O'D., Izumi Nakai, Andreas Pack, Chaussidon, Marc, Hashiguchi, Minako, Ireland, Trevor R., Aiko Nakato, Amari, Sachiko, Hiroharu Yui, Ishikawa, Akira, Katsuyuki Yamashita, Laurette Piani, Ichida, Kiyohiro, Yamashita, Shohei, Toru Yada, Homma, Hisashi, Mutsumi Komatsu, Sara S. Russell, Hiroki Suga, Audrey Bouvier, Ito, Motoo, Masuda, Yuki, Satoshi Tanaka, Tamenori, Yusuke, Ming-Chang Liu, Tetsuya Yokoyama, Smail Mostefaoui, Watanabe, Sei Ichiro, Yoshikawa, Makoto, Eric Quirico, Ariane Deniset-Besseau, Taiga Okumura, Wakabayashi, Daisuke, Noguchi, Takaaki, Barosch, Jens, Sei-ichiro Watanabe, Ohigashi, Takuji, Yin, Qing Zhu, Yamashita, Katsuyuki, Tomoki Nakamura, Ken-ichi Bajo, de Gregorio, Bradley T., Nagashima, Kazuhide, Tomohiro Usui, Yabuta, Hikaru, Piani, Laurette, Hiroshi Hidaka, Yuki Masuda, Kanako Sakamoto, Laure Bejach, Meenakshi Wadhwa, Tachibana, Shogo, Stroud, Rhonda M., Yasuko Terada, David Kilcoyne, A. L., Sakamoto, Kanako, Yui, Hiroharu, Takeichi, Yasuo, Masanao Abe, Bonal, Lydie, Choi, Byeon-Gak, Makoto Yoshikawa, Haba, Makiko K., Kazuko Motomura, Fujiya, Wataru, Jérémie Mathurin, Zita Martins, Kentaro Terada, Hisashi Homma, Kita, Noriko T., Yurimoto, Hisayoshi, Yuki Hibiya, Byeon-Gak Choi, Zhang, Ai Cheng, Pack, Andreas, Park, Changkun, Young, Edward D., Mostefaoui, Smail, Nguyen, Ann N., Frédéric Moynier, Fuyuto Terui, Kazuhide Nagashima, Andrew M. Davis, Di Rocco, Tommaso, Trevor R. Ireland, Hikaru Yabuta +256 morecore +15 more sourcesThe Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu
The Astrophysical Journal Letters, 2023 The nucleosynthetic isotope composition of planetary materials provides a record of the heterogeneous distribution of stardust within the early solar system.Martin Bizzarro, Martin Schiller, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Mayu Morita, Fréderic Moynier, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorný, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto +89 moredoaj +4 more sourcesRyugu Asteroid
, 2023 International audience(162173) Ryugu is a near-Earth C-type (i.e., carbonaceous) asteroid. It has been, after Itokawa, the second target for an asteroidal sample return, thanks to the JAXA Hayabusa2 mission (Watanabe et al. 2019).Levasseur-Regourd, Anny Chantalcore +4 more sourcesSpace weathering acts strongly on the uppermost surface of Ryugu
Communications Earth & Environment, 2023 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 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 +56 moredoaj +2 more sourcesHydrogen Isotopic Composition of Hydrous Minerals in Asteroid Ryugu
The Astrophysical Journal Letters, 2023 Rock fragments of the Cb-type asteroid Ryugu returned to Earth by the JAXA Hayabusa2 mission share mineralogical, chemical, and isotopic properties with the Ivuna-type (CI) carbonaceous chondrites.Laurette Piani, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ken-ichi Bajo, Yoshinari Abe, Jérôme Aléon, Conel M. O’D. Alexander, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frédéric Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Maria Schönbächler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto +87 moredoaj +3 more sourcesUracil in the carbonaceous asteroid (162173) Ryugu
Nature Communications, 2023 Uracil was identified in the sample returned from the asteroid Ryugu. Having been provided to the early Earth as a component in such asteroidal materials, these molecules might have played a role for prebiotic chemical evolution on the early ...Yasuhiro Oba, Toshiki Koga, Yoshinori Takano, Nanako O. Ogawa, Naohiko Ohkouchi, Kazunori Sasaki, Hajime Sato, Daniel P. Glavin, Jason P. Dworkin, Hiroshi Naraoka, Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, 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, Hayabusa2-initial-analysis SOM team +32 moredoaj +3 more sourcesSmall‐scale elemental abundance variations in Ryugu particles from touchdown 1
Meteoritics &Planetary Science, Volume 61, Issue 4, Page 580-599, April 2026.Abstract
Ryugu materials closely resemble CI chondrites' mineralogical, chemical, and isotopic compositions; yet minor but resolvable differences in certain elemental abundances are evident. In this study, the bulk chemical compositions of eight individual Ryugu particles (1.5–4.3 mg) from the first touchdown site (TD1) were determined using triple ...Karina López García, Tetsuya Yokoyama, Ikshu Gautam, Makiko K. Haba, Tsuyoshi Iizuka, Nao Nakanishi, Ryota Fukai +6 morewiley +2 more sources
