Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu—A spinning top–shaped rubble pile-Reference-Cited by-同舟云学术

Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu—A spinning top–shaped rubble pile

Published:2019-04-19 Issue:6437 Volume:364 Page:268-272
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Watanabe S.¹²^ORCID,Hirabayashi M.³^ORCID,Hirata N.⁴^ORCID,Hirata Na.⁵^ORCID,Noguchi R.²^ORCID,Shimaki Y.²^ORCID,Ikeda H.⁶,Tatsumi E.⁷^ORCID,Yoshikawa M.²⁸^ORCID,Kikuchi S.²,Yabuta H.⁹^ORCID,Nakamura T.¹⁰^ORCID,Tachibana S.²⁷^ORCID,Ishihara Y.²^ORCID,Morota T.¹^ORCID,Kitazato K.⁴^ORCID,Sakatani N.²^ORCID,Matsumoto K.⁸¹¹^ORCID,Wada K.¹²^ORCID,Senshu H.¹²^ORCID,Honda C.⁴^ORCID,Michikami T.¹³^ORCID,Takeuchi H.²⁸^ORCID,Kouyama T.¹⁴^ORCID,Honda R.¹⁵^ORCID,Kameda S.¹⁶^ORCID,Fuse T.¹⁷^ORCID,Miyamoto H.⁷^ORCID,Komatsu G.¹²¹⁸^ORCID,Sugita S.⁷^ORCID,Okada T.²⁷^ORCID,Namiki N.⁸¹¹^ORCID,Arakawa M.⁵^ORCID,Ishiguro M.¹⁹^ORCID,Abe M.²⁸^ORCID,Gaskell R.²⁰^ORCID,Palmer E.²⁰^ORCID,Barnouin O. S.²¹^ORCID,Michel P.²²^ORCID,French A. S.²³^ORCID,McMahon J. W.²³^ORCID,Scheeres D. J.²³^ORCID,Abell P. A.²⁴^ORCID,Yamamoto Y.²⁸^ORCID,Tanaka S.²⁸,Shirai K.²^ORCID,Matsuoka M.²^ORCID,Yamada M.¹²^ORCID,Yokota Y.²¹⁵^ORCID,Suzuki H.²⁵^ORCID,Yoshioka K.⁷^ORCID,Cho Y.⁷^ORCID,Tanaka S.⁵,Nishikawa N.⁵,Sugiyama T.⁴^ORCID,Kikuchi H.⁷^ORCID,Hemmi R.⁷^ORCID,Yamaguchi T.²^ORCID,Ogawa N.²^ORCID,Ono G.⁶^ORCID,Mimasu Y.²^ORCID,Yoshikawa K.⁶^ORCID,Takahashi T.²^ORCID,Takei Y.²^ORCID,Fujii A.²^ORCID,Hirose C.⁶^ORCID,Iwata T.²⁸^ORCID,Hayakawa M.²^ORCID,Hosoda S.²^ORCID,Mori O.²^ORCID,Sawada H.²^ORCID,Shimada T.²,Soldini S.²^ORCID,Yano H.²⁸^ORCID,Tsukizaki R.²^ORCID,Ozaki M.²⁸,Iijima Y.²,Ogawa K.⁵^ORCID,Fujimoto M.²,Ho T.-M.²⁶^ORCID,Moussi A.²⁷^ORCID,Jaumann R.²⁸^ORCID,Bibring J.-P.²⁹^ORCID,Krause C.³⁰,Terui F.²^ORCID,Saiki T.²^ORCID,Nakazawa S.²^ORCID,Tsuda Y.²⁸^ORCID

Affiliation:

1. Nagoya University, Nagoya 464-8601, Japan.

2. Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.

3. Auburn University, Auburn, AL 36849, USA.

4. University of Aizu, Aizu-Wakamatsu 965-8580, Japan.

5. Kobe University, Kobe 657-8501, Japan.

6. Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan.

7. University of Tokyo, Tokyo 113-0033, Japan.

8. SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan.

9. Hiroshima University, Higashi-Hiroshima 739-8526, Japan.

10. Tohoku University, Sendai 980-8578, Japan.

11. National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.

12. Chiba Institute of Technology, Narashino 275-0016, Japan.

13. Kindai University, Higashi-Hiroshima 739-2116, Japan.

14. National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064 Japan.

15. Kochi University, Kochi 780-8520, Japan.

16. Rikkyo University, Tokyo 171-8501, Japan.

17. National Institute of Information and Communications Technology, Kashima 314-8501, Japan.

18. Università d’Annunzio, 65127 Pescara, Italy.

19. Seoul National University, Seoul 08826, Korea.

20. Planetary Science Institute, Tucson, AZ 85710, USA.

21. Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.

22. Université Côte d’Azur, Observatoire de la Côte d’Azur, Centre National de la Recherche Scientifique (CNRS), Laboratoire Lagrange, 06304 Nice, France.

23. University of Colorado, Boulder, CO 80309, USA.

24. NASA Johnson Space Center, Houston, TX 77058, USA.

25. Meiji University, Kawasaki 214-8571, Japan.

26. DLR (German Aerospace Center), Institute of Space Systems, 28359 Bremen, Germany.

27. Centre National d’Etudes Spatiales (CNES), 31401 Toulouse, France.

28. DLR, Institute of Planetary Research, 12489 Berlin-Adlershof, Germany.

29. Institute d’Astrophysique Spatiale, 91405 Orsay, France.

30. DLR, Microgravity User Support Center, 51147 Cologne, Germany.

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

Japan Society for the Promotion of Science

French space agency CNES

NASA New Frontier Program

National Institutes of Natural Sciences

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference57 articles.

1. The Provenances of Asteroids, and Their Contributions to the Volatile Inventories of the Terrestrial Planets

2. Hayabusa2: Scientific importance of samples returned from C-type near-Earth asteroid (162173) 1999 JU3