The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy-Reference-Cited by-同舟云学术

The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy

Published:2019-04-19 Issue:6437 Volume:364 Page:272-275
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Kitazato K.¹^ORCID,Milliken R. E.²^ORCID,Iwata T.³⁴^ORCID,Abe M.³⁴^ORCID,Ohtake M.³⁴^ORCID,Matsuura S.⁵^ORCID,Arai T.⁶^ORCID,Nakauchi Y.³^ORCID,Nakamura T.⁷^ORCID,Matsuoka M.³^ORCID,Senshu H.⁸^ORCID,Hirata N.¹^ORCID,Hiroi T.²^ORCID,Pilorget C.⁹,Brunetto R.⁹,Poulet F.⁹,Riu L.³,Bibring J.-P.⁹^ORCID,Takir D.¹⁰^ORCID,Domingue D. L.¹¹,Vilas F.¹¹^ORCID,Barucci M. A.¹²^ORCID,Perna D.¹²¹³^ORCID,Palomba E.¹⁴^ORCID,Galiano A.¹⁴^ORCID,Tsumura K.⁷¹⁵^ORCID,Osawa T.¹⁶^ORCID,Komatsu M.⁴^ORCID,Nakato A.³^ORCID,Arai T.⁸^ORCID,Takato N.⁴¹⁷,Matsunaga T.¹⁸^ORCID,Takagi Y.¹⁹^ORCID,Matsumoto K.⁴¹⁷^ORCID,Kouyama T.²⁰^ORCID,Yokota Y.³²¹^ORCID,Tatsumi E.²²^ORCID,Sakatani N.³^ORCID,Yamamoto Y.³⁴^ORCID,Okada T.³²²^ORCID,Sugita S.²²^ORCID,Honda R.²¹^ORCID,Morota T.²³^ORCID,Kameda S.²⁴^ORCID,Sawada H.³^ORCID,Honda C.¹^ORCID,Yamada M.⁸^ORCID,Suzuki H.²⁵^ORCID,Yoshioka K.²²^ORCID,Hayakawa M.³^ORCID,Ogawa K.²⁶^ORCID,Cho Y.²²^ORCID,Shirai K.³^ORCID,Shimaki Y.³^ORCID,Hirata N.²⁶^ORCID,Yamaguchi A.⁴²⁷^ORCID,Ogawa N.³^ORCID,Terui F.³^ORCID,Yamaguchi T.²⁸^ORCID,Takei Y.³^ORCID,Saiki T.³^ORCID,Nakazawa S.³^ORCID,Tanaka S.³⁴,Yoshikawa M.³⁴^ORCID,Watanabe S.³²³^ORCID,Tsuda Y.³⁴^ORCID

Affiliation:

1. The University of Aizu, Fukushima, Japan.

2. Brown University, Providence, RI, USA.

3. Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan.

4. The Graduate University for Advanced Studies (SOKENDAI), Kanagawa, Japan.

5. Kwansei Gakuin University, Hyogo, Japan.

6. Ashikaga University, Tochigi, Japan.

7. Tohoku University, Sendai, Japan.

8. Chiba Institute of Technology, Chiba, Japan.

9. Institut d’Astrophysique Spatial, Université Paris-Sud, Orsay, France.

10. Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX, USA.

11. Planetary Science Institute, Tucson, AZ, USA.

12. Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris, Meudon, France.

13. Osservatorio Astronomico di Roma, Istituto Nazionale di Astrofisica (INAF), Monte Porzio Catone, Italy.

14. Istituto di Astrofisica e Planetologia Spaziali, INAF, Roma, Italy.

15. Tokyo City University, Tokyo, Japan.

16. Japan Atomic Energy Agency, Ibaraki, Japan.

17. National Astronomical Observatory of Japan, Tokyo, Japan.

18. National Institute for Environmental Studies, Ibaraki, Japan.

19. Aichi Toho University, Nagoya, Japan.

20. National Institute of Advanced Industrial Science and Technology, Tokyo, Japan.

21. Kochi University, Kochi, Japan.

22. The University of Tokyo, Tokyo, Japan.

23. Nagoya University, Nagoya, Japan.

24. Rikkyo University, Tokyo, Japan.

25. Meiji University, Tokyo, Japan.

26. Kobe University, Kobe, Japan.

27. National Institute of Polar Research, Tokyo, Japan.

28. Mitsubishi Electric Corporation, Kanagawa, Japan.

Abstract

Hayabusa2 at the asteroid Ryugu Asteroids fall to Earth in the form of meteorites, but these provide little information about their origins. The Japanese mission Hayabusa2 is designed to collect samples directly from the surface of an asteroid and return them to Earth for laboratory analysis. Three papers in this issue describe the Hayabusa2 team's study of the near-Earth carbonaceous asteroid 162173 Ryugu, at which the spacecraft arrived in June 2018 (see the Perspective by Wurm). Watanabe et al. measured the asteroid's mass, shape, and density, showing that it is a “rubble pile” of loose rocks, formed into a spinning-top shape during a prior period of rapid spin. They also identified suitable landing sites for sample collection. Kitazato et al. used near-infrared spectroscopy to find ubiquitous hydrated minerals on the surface and compared Ryugu with known types of carbonaceous meteorite. Sugita et al. describe Ryugu's geological features and surface colors and combined results from all three papers to constrain the asteroid's formation process. Ryugu probably formed by reaccumulation of rubble ejected by impact from a larger asteroid. These results provide necessary context to understand the samples collected by Hayabusa2, which are expected to arrive on Earth in December 2020. Science , this issue p. 268 , p. 272 , p. 252 ; see also p. 230

Funder

National Aeronautics and Space Administration

H2020 European Research Council

Japan Society for the Promotion of Science

International Network of Planetary Sciences

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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