Y
Yuya Mimasu
Researcher at Japan Aerospace Exploration Agency
Publications - 120
Citations - 2691
Yuya Mimasu is an academic researcher from Japan Aerospace Exploration Agency. The author has contributed to research in topics: Solar sail & Spacecraft. The author has an hindex of 17, co-authored 107 publications receiving 1399 citations. Previous affiliations of Yuya Mimasu include Kyushu University.
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Journal ArticleDOI
Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu—A spinning top–shaped rubble pile
Sei-ichiro Watanabe,Sei-ichiro Watanabe,Masatoshi Hirabayashi,Naru Hirata,Na. Hirata,Rina Noguchi,Yuri Shimaki,H. Ikeda,Eri Tatsumi,Makoto Yoshikawa,Makoto Yoshikawa,Shota Kikuchi,Hikaru Yabuta,Tomoki Nakamura,Shogo Tachibana,Shogo Tachibana,Yoshiaki Ishihara,Tomokatsu Morota,Kohei Kitazato,Naoya Sakatani,Koji Matsumoto,Koji Wada,Hiroki Senshu,C. Honda,Tatsuhiro Michikami,Hiroshi Takeuchi,Hiroshi Takeuchi,Toru Kouyama,R. Honda,Shingo Kameda,Tetsuharu Fuse,Hideaki Miyamoto,Goro Komatsu,S. Sugita,Tatsuaki Okada,Tatsuaki Okada,Noriyuki Namiki,Masahiko Arakawa,Masateru Ishiguro,Masanao Abe,Masanao Abe,Robert Gaskell,Eric Palmer,Olivier S. Barnouin,Patrick Michel,A. S. French,Jay W. McMahon,Daniel J. Scheeres,Paul A. Abell,Yukio Yamamoto,Yukio Yamamoto,Satoshi Tanaka,Satoshi Tanaka,Kei Shirai,Moe Matsuoka,Manabu Yamada,Y. Yokota,Y. Yokota,H. Suzuki,Kosuke Yoshioka,Yuichiro Cho,Naoki Nishikawa,T. Sugiyama,Hideaki Kikuchi,Ryodo Hemmi,Tomohiro Yamaguchi,Naoko Ogawa,Go Ono,Yuya Mimasu,Kent Yoshikawa,T. Takahashi,Yuto Takei,Atsushi Fujii,Chikako Hirose,Takahiro Iwata,Takahiro Iwata,Masahiro Hayakawa,Satoshi Hosoda,Osamu Mori,Hirotaka Sawada,Takanobu Shimada,Stefania Soldini,Hajime Yano,Hajime Yano,Ryudo Tsukizaki,M. Ozaki,M. Ozaki,Yuichi Iijima,K. Ogawa,Masaki Fujimoto,T. M. Ho,Aurelie Moussi,Ralf Jaumann,J. P. Bibring,Christian Krause,Fuyuto Terui,Takanao Saiki,Satoru Nakazawa,Yoshiyuki Tsuda,Yoshiyuki Tsuda +99 more
TL;DR: The Hayabusa2 spacecraft measured the mass, size, shape, density, and spin rate of asteroid Ryugu, showing that it is a porous rubble pile, and observations of Ryugu's shape, mass, and geomorphology suggest that Ryugu was reshaped by centrifugally induced deformation during a period of rapid rotation.
Journal ArticleDOI
The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes
Seiji Sugita,Seiji Sugita,Rie Honda,Tomokatsu Morota,Shingo Kameda,Hirotaka Sawada,Eri Tatsumi,Manabu Yamada,C. Honda,Yasuhiro Yokota,Yasuhiro Yokota,Toru Kouyama,Naoya Sakatani,K. Ogawa,H. Suzuki,Tatsuaki Okada,Tatsuaki Okada,Noriyuki Namiki,Satoshi Tanaka,Satoshi Tanaka,Yuichi Iijima,Kosuke Yoshioka,Masahiro Hayakawa,Yuichiro Cho,Moe Matsuoka,Naru Hirata,Hideaki Miyamoto,Deborah L. Domingue,Masatoshi Hirabayashi,Tomoki Nakamura,Takahiro Hiroi,Tatsuhiro Michikami,Patrick Michel,Ronald-Louis Ballouz,Ronald-Louis Ballouz,Olivier S. Barnouin,Carolyn M. Ernst,Stefan Schröder,Hideaki Kikuchi,Ryodo Hemmi,Goro Komatsu,Goro Komatsu,T. Fukuhara,Makoto Taguchi,Takehiko Arai,Hiroki Senshu,Hirohide Demura,Yoshiko Ogawa,Yuri Shimaki,Tomohiko Sekiguchi,T. G. Müller,Axel Hagermann,Takahide Mizuno,Hirotomo Noda,Koji Matsumoto,R. Yamada,Yoshiaki Ishihara,H. Ikeda,Hiroshi Araki,K. Yamamoto,Shinsuke Abe,Fumi Yoshida,A. Higuchi,Sho Sasaki,S. Oshigami,Seiitsu Tsuruta,Kazuyoshi Asari,Seiichi Tazawa,M. Shizugami,J. Kimura,Toshimichi Otsubo,Hikaru Yabuta,Sunao Hasegawa,Masateru Ishiguro,Shogo Tachibana,Eric Palmer,Robert Gaskell,L. Le Corre,Ralf Jaumann,Katharina A. Otto,Nicole Schmitz,Paul A. Abell,M. A. Barucci,Michael E. Zolensky,Faith Vilas,Florian Thuillet,C. Sugimoto,N. Takaki,Yutaka Suzuki,Hiroaki Kamiyoshihara,Masato Okada,Kenji Nagata,Masaki Fujimoto,Makoto Yoshikawa,Makoto Yoshikawa,Yukio Yamamoto,Yukio Yamamoto,Kei Shirai,Rina Noguchi,Naoko Ogawa,Fuyuto Terui,Shota Kikuchi,Tomohiro Yamaguchi,Yusuke Oki,Yuki Takao,Hiroshi Takeuchi,Go Ono,Yuya Mimasu,Kent Yoshikawa,T. Takahashi,Yuto Takei,Atsushi Fujii,Chikako Hirose,Satoru Nakazawa,Satoshi Hosoda,Osamu Mori,Takanobu Shimada,Stefania Soldini,Takahiro Iwata,Takahiro Iwata,Masanao Abe,Masanao Abe,Hajime Yano,Hajime Yano,Ryudo Tsukizaki,M. Ozaki,M. Ozaki,Kazutaka Nishiyama,Takanao Saiki,Sei-ichiro Watanabe,Sei-ichiro Watanabe,Yoshiyuki Tsuda,Yoshiyuki Tsuda +132 more
TL;DR: Spectral observations and a principal components analysis suggest that Ryugu originates from the Eulalia or Polana asteroid family in the inner main belt, possibly via more than one generation of parent bodies.
Journal ArticleDOI
An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime
Masahiko Arakawa,Takanao Saiki,Koji Wada,Kazunori Ogawa,Kazunori Ogawa,Toshihiko Kadono,Kei Shirai,Kei Shirai,Hirotaka Sawada,Ko Ishibashi,Rie Honda,Naoya Sakatani,Yuichi Iijima,C. Okamoto,Hajime Yano,Y. Takagi,Masahiro Hayakawa,P. Michel,Martin Jutzi,Yuri Shimaki,S. Kimura,Yuya Mimasu,Tomoaki Toda,H. Imamura,Satoru Nakazawa,Hajime Hayakawa,Seiji Sugita,Seiji Sugita,Tomokatsu Morota,Shingo Kameda,Eri Tatsumi,Eri Tatsumi,Yuichiro Cho,Kosuke Yoshioka,Yasuhiro Yokota,Yasuhiro Yokota,Moe Matsuoka,Manabu Yamada,Toru Kouyama,C. Honda,Yuichi Tsuda,Sei-ichiro Watanabe,Sei-ichiro Watanabe,Makoto Yoshikawa,Makoto Yoshikawa,Satoshi Tanaka,Satoshi Tanaka,Fuyuto Terui,Shota Kikuchi,Tomohiro Yamaguchi,Naoko Ogawa,Go Ono,Kent Yoshikawa,T. Takahashi,Yuto Takei,Atsushi Fujii,Hiroshi Takeuchi,Hiroshi Takeuchi,Yukio Yamamoto,Yukio Yamamoto,Tatsuaki Okada,Tatsuaki Okada,Chikako Hirose,Satoshi Hosoda,Osamu Mori,Takanobu Shimada,Stefania Soldini,Ryudo Tsukizaki,Takahiro Iwata,Takahiro Iwata,M. Ozaki,M. Ozaki,Masanao Abe,Masanao Abe,Noriyuki Namiki,Kohei Kitazato,Shogo Tachibana,H. Ikeda,Naru Hirata,Rina Noguchi,Akira Miura,Akira Miura +81 more
TL;DR: An impact experiment on Ryugu is described using Hayabusa2’s Small Carry-on Impactor, which produced an artificial crater with a diameter >10 meters, which has a semicircular shape, an elevated rim, and a central pit, and implications for Ryugu's surface age are discussed.
Journal ArticleDOI
Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution
Tomokatsu Morota,Tomokatsu Morota,Seiji Sugita,Seiji Sugita,Yasuo Cho,Masanori Kanamaru,Eri Tatsumi,Eri Tatsumi,Eri Tatsumi,Naoya Sakatani,Rie Honda,Naru Hirata,Hiroshi Kikuchi,Manabu Yamada,Yasuhiro Yokota,Yasuhiro Yokota,Shingo Kameda,Moe Matsuoka,Hirotaka Sawada,C. Honda,Toru Kouyama,Kazunori Ogawa,Kazunori Ogawa,H. Suzuki,Kosuke Yoshioka,Masahiro Hayakawa,Masatoshi Hirabayashi,Hirdy Miyamoto,Hirdy Miyamoto,Tatsuhiro Michikami,Takahiro Hiroi,Ryodo Hemmi,Olivier S. Barnouin,Carolyn M. Ernst,Kohei Kitazato,Tomoki Nakamura,Lucie Riu,Hiroki Senshu,Hiroshi Kobayashi,Sono Sasaki,Goro Komatsu,Naoya Tanabe,Y. Fujii,T. Irie,M. Suemitsu,N. Takaki,C. Sugimoto,Koki Yumoto,M. Ishida,H. Kato,Keiichi Moroi,Deborah L. Domingue,P. Michel,C. Pilorget,Takahiro Iwata,Takahiro Iwata,Masanao Abe,Masanao Abe,Makiko Ohtake,Makiko Ohtake,Yusuke Nakauchi,Kohji Tsumura,Kohji Tsumura,Hikaru Yabuta,Yoshiaki Ishihara,Rina Noguchi,Koji Matsumoto,Akira Miura,Akira Miura,Noriyuki Namiki,Shogo Tachibana,Shogo Tachibana,Masahiko Arakawa,H. Ikeda,Koji Wada,Takahide Mizuno,Takahide Mizuno,Chikako Hirose,Satoshi Hosoda,Osamu Mori,Takanobu Shimada,Stefania Soldini,Stefania Soldini,Ryudo Tsukizaki,Hajime Yano,Hajime Yano,M. Ozaki,M. Ozaki,Hiroshi Takeuchi,Hiroshi Takeuchi,Yukio Yamamoto,Yukio Yamamoto,Tatsuaki Okada,Tatsuaki Okada,Yuri Shimaki,Kei Shirai,Yuichi Iijima,Hirotomo Noda,Shota Kikuchi,Tomohiro Yamaguchi,Naoko Ogawa,Go Ono,Yuya Mimasu,Kent Yoshikawa,T. Takahashi,Yuto Takei,Atsushi Fujii,Satoru Nakazawa,Fuyuto Terui,Satoshi Tanaka,Satoshi Tanaka,Makoto Yoshikawa,Makoto Yoshikawa,Takanao Saiki,Sei-ichiro Watanabe,Sei-ichiro Watanabe,Yuichi Tsuda,Yuichi Tsuda +117 more
TL;DR: The authors conclude that the asteroid experienced a prior period of strong solar heating caused by changes in its orbit, and suggest that Ryugu previously experienced an orbital excursion near the Sun.
Journal ArticleDOI
Highly porous nature of a primitive asteroid revealed by thermal imaging
Tatsuaki Okada,Tatsuaki Okada,Tetsuya Fukuhara,Satoshi Tanaka,Satoshi Tanaka,Satoshi Tanaka,Makoto Taguchi,Takehiko Arai,Hiroki Senshu,Naoya Sakatani,Yuri Shimaki,Hirohide Demura,Yoshiko Ogawa,Kentaro Suko,Tomohiko Sekiguchi,Toru Kouyama,Jun Takita,Tsuneo Matsunaga,Takeshi Imamura,Takehiko Wada,Sunao Hasegawa,Jörn Helbert,Thomas G. Müller,Axel Hagermann,Jens Biele,Matthias Grott,Maximilian Hamm,Maximilian Hamm,Marco Delbo,Naru Hirata,Naoyuki Hirata,Yukio Yamamoto,Yukio Yamamoto,Seiji Sugita,Seiji Sugita,Noriyuki Namiki,Kohei Kitazato,Masahiko Arakawa,Shogo Tachibana,Shogo Tachibana,Hitoshi Ikeda,Masateru Ishiguro,Koji Wada,Chikatoshi Honda,Rie Honda,Yoshiaki Ishihara,Koji Matsumoto,Moe Matsuoka,Tatsuhiro Michikami,Akira Miura,Tomokatsu Morota,Hirotomo Noda,Rina Noguchi,Kazunori Ogawa,Kazunori Ogawa,Kei Shirai,Eri Tatsumi,Eri Tatsumi,Hikaru Yabuta,Yasuhiro Yokota,Manabu Yamada,Masanao Abe,Masanao Abe,Masahiko Hayakawa,Takahiro Iwata,Takahiro Iwata,Masanobu Ozaki,Masanobu Ozaki,Hajime Yano,Hajime Yano,Satoshi Hosoda,Osamu Mori,Hirotaka Sawada,Takanobu Shimada,Hiroshi Takeuchi,Hiroshi Takeuchi,Ryudo Tsukizaki,Atsushi Fujii,Chikako Hirose,Shota Kikuchi,Yuya Mimasu,Naoko Ogawa,Go Ono,T. Takahashi,T. Takahashi,Yuto Takei,Tomohiro Yamaguchi,Tomohiro Yamaguchi,Kent Yoshikawa,Fuyuto Terui,Takanao Saiki,Satoru Nakazawa,Makoto Yoshikawa,Makoto Yoshikawa,Sei-ichiro Watanabe,Sei-ichiro Watanabe,Yuichi Tsuda,Yuichi Tsuda +97 more
TL;DR: Thermal imaging data obtained from the spacecraft Hayabusa2 reveal that the carbonaceous asteroid 162173 Ryugu is an object of unusually high porosity, which constrain the formation history of Ryugu.