Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution

Collapse authors list.
Morota, T, Sugita, S, Cho, Y, Kanamaru, M, Tatsumi, E, Sakatanit, N, Honda, R, Hirata, N, Kikuchi, H, Yamada, M et al (show 85 more authors) , Yokota, Y, Kamedal, 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, OS, Ernst, CM, Kitazatou, 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, Ohtake, M, Nakauchi, Y, Tsumura, K, Yabuta, H, Ishihara, Y, Noguchi, R, Matsumoto, K, Miura, A, Namiki, N, Tachibana, S, Arakawa, M, Ikeda, H, Wada, K, Mizuno, T, Hirose, C, Hosoda, S, Mori, O, Shimada, T, Soldini, S ORCID: 0000-0003-3121-3845, Tsukizaki, R, Yano, H, Ozaki, M, Takeuchi, H, Yamamoto, Y, Okada, T, Shimaki, Y, Shirai, K, Iijima, Y, Noda, H, Kikuchi, S, Yamaguchi, T, Ogawa, N, Ono, G, Mimasu, Y, Yoshikawa, K, Takahashi, T, Takei, Y, Fujii, A, Nakazawa, S, Terui, F, Tanaka, S, Yoshikawa, M, Saiki, T, Watanabe, S and Tsuda, Y (2020) Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution SCIENCE, 368 (6491). 654-+. ISSN 0036-8075, 1095-9203

Text Morota_TDpaper_20190912.pdf - Author Accepted Manuscript Download (319kB) | Preview

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.

Item Type:	Article
Uncontrolled Keywords:	5109 Space Sciences, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	19 May 2020 08:53
Last Modified:	16 Jun 2026 12:06
DOI:	10.1126/science.aaz6306
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3087896
Disclaimer:	The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.