太陽系科学研究系

プロフィール

（併任）
　はやぶさ２プロジェクトチーム
　国際宇宙探査センター火星衛星探査機プロジェクトチーム
（兼務）
　関西学院大学大学院理工学研究科客員教授

研究分野

自然科学一般 / 天文学 / 電波天文学、宇宙測地学
自然科学一般 / 宇宙惑星科学 /

論文

Spectrophotometric Properties of 162173 Ryugu’s Surface from the NIRS3 Opposition Observations

Deborah Domingue Kohei Kitazato Moe Matsuoka Yasuhiro Yokota Eri Tatsumi Takahiro Iwata Masanao Abe Makiko Ohtake Shuji Matsuura Stefan Schröder Faith Vilas Antonella Barucci Rosario Brunetto Driss Takir Lucille Le Corre Nicholas Moskovitz

The Planetary Science Journal 2(5) 178-178 2021年10月 [査読有り]

Abstract

Examination of the opposition geometry properties show that Ryugu’s surface regolith is commensurate with laboratory studies of the photometric behavior of powdered carbonaceous chondrites. The regolith is consistent with a broad grain ...

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 Astronomy 5(8) 766-774 2021年8月 [査読有り]

Planetesimals—the initial stage of the planetary formation process—are considered to be initially very porous aggregates of dusts1,2, and subsequent thermal and compaction processes reduce their porosity3. The Hayabusa2 spacecraft found that bould...

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 Research 68(3) 1533-1555 2021年8月 [査読有り]

Hayabusa2 is the Japanese Asteroid Return Mission and targeted the carbonaceous asteroid Ryugu, conducted by the Japan Aerospace Exploration Agency (JAXA). The goal of this mission was to conduct proximity operations including remote sensing obser...

Hydrogen abundance estimation model and application to (162173) Ryugu

A. Praet M. A. Barucci P. H. Hasselmann K. Kitazato T. Iwata M. Matsuoka D. Domingue B. E. Clark

Astronomy & Astrophysics 649 L16-L16 2021年5月 [査読有り]

Context. The JAXA asteroid sample return mission Hayabusa2 acquired a huge quantity of data from the asteroid (162173) Ryugu during its 1.5 years in asteroid proximity orbit. On December 5, 2020 (Japan time), Hayabusa brought back to Earth a 5.4 g...

Thermally altered subsurface material of asteroid (162173) Ryugu

K. Kitazato R. E. Milliken T. Iwata M. Abe M. Ohtake S. Matsuura Y. Takagi T. Nakamura T. Hiroi M. Matsuoka L. Riu Y. Nakauchi K. Tsumura T. Arai H. Senshu N. Hirata M. A. Barucci R. Brunetto C. Pilorget F. Poulet J.-P. Bibring D. L. Domingue F. Vilas D. Takir E. Palomba A. Galiano D. Perna T. Osawa M. Komatsu A. Nakato T. Arai N. Takato T. Matsunaga M. Arakawa T. Saiki K. Wada T. Kadono H. Imamura H. Yano K. Shirai M. Hayakawa C. Okamoto H. Sawada K. Ogawa Y. Iijima S. Sugita R. Honda T. Morota S. Kameda E. Tatsumi Y. Cho K. Yoshioka Y. Yokota N. Sakatani M. Yamada T. Kouyama H. Suzuki C. Honda N. Namiki T. Mizuno K. Matsumoto H. Noda Y. Ishihara R. Yamada K. Yamamoto F. Yoshida S. Abe A. Higuchi Y. Yamamoto T. Okada Y. Shimaki R. Noguchi A. Miura N. Hirata S. Tachibana H. Yabuta M. Ishiguro H. Ikeda H. Takeuchi T. Shimada O. Mori S. Hosoda R. Tsukizaki S. Soldini M. Ozaki F. Terui N. Ogawa Y. Mimasu G. Ono K. Yoshikawa C. Hirose A. Fujii T. Takahashi S. Kikuchi Y. Takei T. Yamaguchi S. Nakazawa S. Tanaka M. Yoshikawa S. Watanabe Y. Tsuda

Nature Astronomy 5(3) 246-250 2021年3月 [査読有り]

Analyses of meteorites and theoretical models indicate that some carbonaceous near-Earth asteroids may have been thermally altered due to radiative heating during close approaches to the Sun1–3. However, the lack of direct measurements on the subs...