First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu

Author:

Okazaki Ryuji1ORCID,Miura Yayoi N.2ORCID,Takano Yoshinori3ORCID,Sawada Hirotaka4ORCID,Sakamoto Kanako4ORCID,Yada Toru4ORCID,Yamada Keita5ORCID,Kawagucci Shinsuke67ORCID,Matsui Yohei67ORCID,Hashizume Ko8ORCID,Ishida Akizumi9ORCID,Broadley Michael W.10ORCID,Marty Bernard10ORCID,Byrne David10ORCID,Füri Evelyn10ORCID,Meshik Alex11ORCID,Pravdivtseva Olga11ORCID,Busemann Henner12ORCID,Riebe My E.I.12ORCID,Gilmour Jamie13ORCID,Park Jisun1415ORCID,Bajo Ken-ichi16ORCID,Righter Kevin17ORCID,Sakai Saburo3ORCID,Sekimoto Shun18ORCID,Kitajima Fumio1,Crowther Sarah A.13ORCID,Iwata Naoyoshi19ORCID,Shirai Naoki2021ORCID,Ebihara Mitsuru20ORCID,Yokochi Reika22ORCID,Nishiizumi Kunihiko23,Nagao Keisuke24,Lee Jong Ik24ORCID,Clay Patricia13,Kano Akihiro25,Caffee Marc W.2627ORCID,Uemura Ryu28ORCID,Inagaki Makoto18ORCID,Krietsch Daniela12ORCID,Maden Colin12ORCID,Yamamoto Mizuki1ORCID,Fawcett Lydia13ORCID,Lawton Thomas13ORCID,Nakamura Tomoki9ORCID,Naraoka Hiroshi1ORCID,Noguchi Takaaki29ORCID,Yabuta Hikaru30ORCID,Yurimoto Hisayoshi16ORCID,Tsuda Yuichi4ORCID,Watanabe Sei-ichiro28ORCID,Abe Masanao431ORCID,Arakawa Masahiko32ORCID,Fujii Atsushi4ORCID,Hayakawa Masahiko4ORCID,Hirata Naoyuki32ORCID,Hirata Naru33ORCID,Honda Rie34ORCID,Honda Chikatoshi33ORCID,Hosoda Satoshi4ORCID,Iijima Yu-ichi4,Ikeda Hitoshi4ORCID,Ishiguro Masateru35ORCID,Ishihara Yoshiaki36ORCID,Iwata Takahiro4ORCID,Kawahara Kosuke4ORCID,Kikuchi Shota3738ORCID,Kitazato Kohei33ORCID,Matsumoto Koji3138ORCID,Matsuoka Moe39ORCID,Michikami Tatsuhiro40ORCID,Mimasu Yuya4ORCID,Miura Akira4ORCID,Morota Tomokatsu25ORCID,Nakazawa Satoru4ORCID,Namiki Noriyuki3138ORCID,Noda Hirotomo3138ORCID,Noguchi Rina41ORCID,Ogawa Naoko4ORCID,Ogawa Kazunori36ORCID,Okada Tatsuaki442ORCID,Okamoto Chisato32,Ono Go43ORCID,Ozaki Masanobu431ORCID,Saiki Takanao431ORCID,Sakatani Naoya44ORCID,Senshu Hiroki37ORCID,Shimaki Yuri4ORCID,Shirai Kei432ORCID,Sugita Seiji25ORCID,Takei Yuto4ORCID,Takeuchi Hiroshi4ORCID,Tanaka Satoshi4ORCID,Tatsumi Eri2545ORCID,Terui Fuyuto46ORCID,Tsukizaki Ryudo4ORCID,Wada Koji37ORCID,Yamada Manabu37ORCID,Yamada Tetsuya4ORCID,Yamamoto Yukio4ORCID,Yano Hajime431ORCID,Yokota Yasuhiro4ORCID,Yoshihara Keisuke4ORCID,Yoshikawa Makoto431ORCID,Yoshikawa Kent4ORCID,Furuya Shizuho4ORCID,Hatakeda Kentaro47ORCID,Hayashi Tasuku4ORCID,Hitomi Yuya47ORCID,Kumagai Kazuya47,Miyazaki Akiko4ORCID,Nakato Aiko4ORCID,Nishimura Masahiro4ORCID,Soejima Hiromichi47ORCID,Iwamae Ayako47ORCID,Yamamoto Daiki448ORCID,Yogata Kasumi4ORCID,Yoshitake Miwa4ORCID,Fukai Ryota4ORCID,Usui Tomohiro4ORCID,Ireland Trevor49ORCID,Connolly Harold C.50ORCID,Lauretta Dante S.51ORCID,Tachibana Shogo52ORCID

Affiliation:

1. Department of Earth and Planetary Sciences, Kyushu University, Fukuoka 819-0395, Japan.

2. Earthquake Research Institute, The University of Tokyo, Tokyo 113-0032, Japan.

3. Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, Japan.

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

5. Department of Chemical Science and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan.

6. Research Institute for Global Change, JAMSTEC, Yokosuka 237-0061, Japan.

7. Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-star), JAMSTEC, Yokosuka 237-0061, Japan.

8. Faculty of Science, Ibaraki University, Mito 310-8512, Japan.

9. Department of Earth Science, Tohoku University, Sendai 980-8578, Japan.

10. Université de Lorraine, CNRS, CRPG, F-54000 Nancy, France.

11. Physics Department, Washington University, St. Louis, MO 63130, USA.

12. Institute of Geochemistry and Petrology, Eidgenössische Technische Hochschule (ETH) Zürich, 8092 Zürich, Switzerland.

13. Department of Earth and Environmental Sciences, The University of Manchester, Manchester M13 9PL, UK.

14. Department of Physical Sciences, Kingsborough Community College, The City University of New York, Brooklyn, NY 11235, USA.

15. Department of Earth and Planetary Sciences, American Museum of Natural History, NY 10024, USA.

16. Department of Earth and Planetary Sciences, Hokkaido University, Sapporo 060-0810, Japan.

17. Astromaterials Research and Exploration Science, Mail Code XI2, National Aeronautics and Space Administration (NASA) Johnson Space Center, Houston, TX 77058, USA.

18. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan.

19. Faculty of Science, Yamagata University, Yamagata 990-8560, Japan.

20. Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.

21. Department of Chemistry, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa 259-1293, Japan.

22. Department of the Geophysical Sciences, The University of Chicago, Chicago, IL 60637, USA.

23. Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA.

24. Division of Earth Sciences, Korea Polar Research Institute, Incheon 21990, Korea.

25. School of Science, The University of Tokyo, Tokyo 113-0033, Japan.

26. Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA.

27. Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, USA.

28. Department of Earth and Environmental Sciences, Nagoya University, Nagoya 464-8601, Japan.

29. Division of Earth and Planetary Sciences, Kyoto University, Kyoto 606-8502, Japan.

30. Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.

31. Department of Space and Astronautical Science, The Graduate University for Advanced Studies, Hayama 240-0193, Japan.

32. Department of Planetology, Kobe University, Kobe 657-8501, Japan.

33. Aizu Research Cluster for Space Science, University of Aizu, Aizu-Wakamatsu 965-8580, Japan.

34. Center for Data Science, Ehime University, Matsuyama 790-8577, Japan.

35. Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea.

36. JAXA Space Exploration Center, JAXA, Sagamihara 252-5210, Japan.

37. Planetary Exploration Research Center, Chiba Institute of Technology, Narashino 275-0016, Japan.

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

39. Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8567, Japan.

40. Faculty of Engineering, Kindai University, Higashi-Hiroshima 739-2116, Japan.

41. Faculty of Science, Niigata University, Niigata 950-2181, Japan.

42. Department of Chemistry, The University of Tokyo, Tokyo 113-0033, Japan.

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

44. Department of Physics, Rikkyo University, Tokyo 171-8501, Japan.

45. Instituto de Astrofísica de Canarias, University of La Laguna, Tenerife, Spain.

46. Department of Mechanical Engineering, Kanagawa Institute of Technology, Atsugi 243-0292, Japan.

47. Marine Works Japan Ltd., Yokosuka 237-0063, Japan.

48. Department of Earth and Planetary Science, Tokyo Institute of Technology, Ōokayama, Tokyo 152-8550, Japan.

49. School of Earth and Environmental Sciences, The University of Queensland, St Lucia, QLD 4072, Australia.

50. Department of Geology, School of Earth and Environment, Rowan University, Glassboro, NJ 08028, USA.

51. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.

52. UTokyo Organization for Planetary and Space Science, The University of Tokyo, Tokyo 113-0033, Japan.

Abstract

The Hayabusa2 spacecraft returned to Earth from the asteroid 162173 Ryugu on 6 December 2020. One day after the recovery, the gas species retained in the sample container were extracted and measured on-site and stored in gas collection bottles. The container gas consists of helium and neon with an extraterrestrial 3 He/ 4 He and 20 Ne/ 22 Ne ratios, along with some contaminant terrestrial atmospheric gases. A mixture of solar and Earth’s atmospheric gas is the best explanation for the container gas composition. Fragmentation of Ryugu grains within the sample container is discussed on the basis of the estimated amount of indigenous He and the size distribution of the recovered Ryugu grains. This is the first successful return of gas species from a near-Earth asteroid.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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