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Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution.
Morota, T; Sugita, S; Cho, Y; Kanamaru, M; Tatsumi, E; Sakatani, N; Honda, R; Hirata, N; Kikuchi, H; Yamada, M; Yokota, Y; Kameda, S; Matsuoka, M; Sawada, H; Honda, C; Kouyama, T; Ogawa, K; Suzuki, H; Yoshioka, K; Hayakawa, M; Hirata, N; Hirabayashi, M; Miyamoto, H; Michikami, T; Hiroi, T; Hemmi, R; Barnouin, O S; Ernst, C M; Kitazato, K; Nakamura, T; Riu, L; Senshu, H; Kobayashi, H; Sasaki, S; Komatsu, G; Tanabe, N; Fujii, Y; Irie, T; Suemitsu, M; Takaki, N; Sugimoto, C; Yumoto, K; Ishida, M; Kato, H; Moroi, K; Domingue, D; Michel, P; Pilorget, C; Iwata, T; Abe, M.
Afiliação
  • Morota T; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan. morota@eps.s.u-tokyo.ac.jp.
  • Sugita S; Departments of Earth and Environmental Sciences and Physics, Nagoya University, Nagoya 464-8601, Japan.
  • Cho Y; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Kanamaru M; Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Tatsumi E; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Sakatani N; Department of Earth and Space Science, Osaka University, Toyonaka 560-0043, Japan.
  • Honda R; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Hirata N; Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain.
  • Kikuchi H; Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain.
  • Yamada M; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Yokota Y; Department of Information Science, Kochi University, Kochi 780-8520, Japan.
  • Kameda S; Department of Planetology, Kobe University, Kobe 657-8501, Japan.
  • Matsuoka M; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Sawada H; Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Honda C; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Kouyama T; Department of Information Science, Kochi University, Kochi 780-8520, Japan.
  • Ogawa K; Department of Physics, Rikkyo University, Tokyo 171-8501, Japan.
  • Suzuki H; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Yoshioka K; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Hayakawa M; School of Computer Science and Engineering, University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Hirata N; National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064 Japan.
  • Hirabayashi M; Department of Planetology, Kobe University, Kobe 657-8501, Japan.
  • Miyamoto H; JAXA Space Exploration Center, Japan Aerospace Exploration Agency, Sagamihara 252-5210, Japan.
  • Michikami T; Department of Physics, Meiji University, Kawasaki 214-8571, Japan.
  • Hiroi T; Department of Complexity Science and Engineering, The University of Tokyo, Kashiwa 277-8561, Japan.
  • Hemmi R; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Barnouin OS; School of Computer Science and Engineering, University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Ernst CM; Department of Aerospace Engineering, Auburn University, Auburn, AL 36849, USA.
  • Kitazato K; Department of Systems Innovation, The University of Tokyo, Tokyo 113-8656, Japan.
  • Nakamura T; Planetary Science Institute, Tucson, AZ 85719, USA.
  • Riu L; Faculty of Engineering, Kindai University, Higashi-Hiroshima 739-2116, Japan.
  • Senshu H; Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, USA.
  • Kobayashi H; The University Museum, The University of Tokyo, Tokyo 113-0033, Japan.
  • Sasaki S; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Komatsu G; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Tanabe N; School of Computer Science and Engineering, University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Fujii Y; Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.
  • Irie T; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Suemitsu M; Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Takaki N; Departments of Earth and Environmental Sciences and Physics, Nagoya University, Nagoya 464-8601, Japan.
  • Sugimoto C; Department of Earth and Space Science, Osaka University, Toyonaka 560-0043, Japan.
  • Yumoto K; International Research School of Planetary Sciences, Università d'Annunzio, 65127 Pescara, Italy.
  • Ishida M; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Kato H; Department of Information Science, Kochi University, Kochi 780-8520, Japan.
  • Moroi K; Departments of Earth and Environmental Sciences and Physics, Nagoya University, Nagoya 464-8601, Japan.
  • Domingue D; Departments of Earth and Environmental Sciences and Physics, Nagoya University, Nagoya 464-8601, Japan.
  • Michel P; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Pilorget C; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Iwata T; Department of Earth and Planetary Science, The University of Tokyo, Tokyo 113-0033, Japan.
  • Abe M; Department of Physics, Rikkyo University, Tokyo 171-8501, Japan.
Science ; 368(6491): 654-659, 2020 05 08.
Article em En | MEDLINE | ID: mdl-32381723
ABSTRACT
The near-Earth asteroid (162173) Ryugu is thought to be a primitive carbonaceous object that contains hydrated minerals and organic molecules. We report sample collection from Ryugu's surface by the Hayabusa2 spacecraft on 21 February 2019. Touchdown images and global observations of surface colors are used to investigate the stratigraphy of the surface around the sample location and across Ryugu. Latitudinal color variations suggest the reddening of exposed surface material by solar heating and/or space weathering. Immediately after touchdown, Hayabusa2's thrusters disturbed dark, fine grains that originate from the redder materials. The stratigraphic relationship between identified craters and the redder material indicates that surface reddening occurred over a short period of time. We suggest that Ryugu previously experienced an orbital excursion near the Sun.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2020 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2020 Tipo de documento: Article