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Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu-A spinning top-shaped rubble pile.
Watanabe, S; Hirabayashi, M; Hirata, N; Hirata, Na; Noguchi, R; Shimaki, Y; Ikeda, H; Tatsumi, E; Yoshikawa, M; Kikuchi, S; Yabuta, H; Nakamura, T; Tachibana, S; Ishihara, Y; Morota, T; Kitazato, K; Sakatani, N; Matsumoto, K; Wada, K; Senshu, H; Honda, C; Michikami, T; Takeuchi, H; Kouyama, T; Honda, R; Kameda, S; Fuse, T; Miyamoto, H; Komatsu, G; Sugita, S; Okada, T; Namiki, N; Arakawa, M; Ishiguro, M; Abe, M; Gaskell, R; Palmer, E; Barnouin, O S; Michel, P; French, A S; McMahon, J W; Scheeres, D J; Abell, P A; Yamamoto, Y; Tanaka, S; Shirai, K; Matsuoka, M; Yamada, M; Yokota, Y; Suzuki, H.
Afiliación
  • Watanabe S; Nagoya University, Nagoya 464-8601, Japan. seicoro@eps.nagoya-u.ac.jp.
  • Hirabayashi M; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Hirata N; Auburn University, Auburn, AL 36849, USA.
  • Hirata N; University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Noguchi R; Kobe University, Kobe 657-8501, Japan.
  • Shimaki Y; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Ikeda H; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Tatsumi E; Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan.
  • Yoshikawa M; University of Tokyo, Tokyo 113-0033, Japan.
  • Kikuchi S; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Yabuta H; SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan.
  • Nakamura T; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Tachibana S; Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
  • Ishihara Y; Tohoku University, Sendai 980-8578, Japan.
  • Morota T; University of Tokyo, Tokyo 113-0033, Japan.
  • Kitazato K; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Sakatani N; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Matsumoto K; Nagoya University, Nagoya 464-8601, Japan.
  • Wada K; University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Senshu H; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Honda C; National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.
  • Michikami T; SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan.
  • Takeuchi H; Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Kouyama T; Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Honda R; University of Aizu, Aizu-Wakamatsu 965-8580, Japan.
  • Kameda S; Kindai University, Higashi-Hiroshima 739-2116, Japan.
  • Fuse T; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Miyamoto H; SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan.
  • Komatsu G; National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064 Japan.
  • Sugita S; Kochi University, Kochi 780-8520, Japan.
  • Okada T; Rikkyo University, Tokyo 171-8501, Japan.
  • Namiki N; National Institute of Information and Communications Technology, Kashima 314-8501, Japan.
  • Arakawa M; University of Tokyo, Tokyo 113-0033, Japan.
  • Ishiguro M; Università d'Annunzio, 65127 Pescara, Italy.
  • Abe M; Chiba Institute of Technology, Narashino 275-0016, Japan.
  • Gaskell R; University of Tokyo, Tokyo 113-0033, Japan.
  • Palmer E; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Barnouin OS; University of Tokyo, Tokyo 113-0033, Japan.
  • Michel P; National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.
  • French AS; SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan.
  • McMahon JW; Kobe University, Kobe 657-8501, Japan.
  • Scheeres DJ; Seoul National University, Seoul 08826, Korea.
  • Abell PA; Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.
  • Yamamoto Y; SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan.
  • Tanaka S; Planetary Science Institute, Tucson, AZ 85710, USA.
  • Shirai K; Planetary Science Institute, Tucson, AZ 85710, USA.
  • Matsuoka M; Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.
  • Yamada M; Université Côte d'Azur, Observatoire de la Côte d'Azur, Centre National de la Recherche Scientifique (CNRS), Laboratoire Lagrange, 06304 Nice, France.
  • Yokota Y; University of Colorado, Boulder, CO 80309, USA.
  • Suzuki H; University of Colorado, Boulder, CO 80309, USA.
Science ; 364(6437): 268-272, 2019 04 19.
Article en En | MEDLINE | ID: mdl-30890588
ABSTRACT
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2019 Tipo del documento: Article País de afiliación: Japón
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2019 Tipo del documento: Article País de afiliación: Japón