Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth

S Tachibana,H Sawada,R Okazaki,Y Takano,K Sakamoto,Y N Miura, C Okamoto,H Yano,S Yamanouchi,P Michel,Y Zhang,S Schwartz,F Thuillet,H Yurimoto,T Nakamura,T Noguchi,H Yabuta,H Naraoka,A Tsuchiyama,N Imae,K Kurosawa,A M Nakamura,K Ogawa,S Sugita,T Morota,R Honda,S Kameda,E Tatsumi,Y Cho,K Yoshioka,Y Yokota,M Hayakawa,M Matsuoka,N Sakatani,M Yamada,T Kouyama,H Suzuki,C Honda,T Yoshimitsu,T Kubota, H Demura,T Yada,M Nishimura,K Yogata,A Nakato,M Yoshitake,A I Suzuki,S Furuya,K Hatakeda,A Miyazaki,K Kumagai,T Okada,M Abe,T Usui,T R Ireland,M Fujimoto,T Yamada,M Arakawa,H C Connolly,A Fujii,S Hasegawa,N Hirata,C Hirose,S Hosoda,Y Iijima,H Ikeda,M Ishiguro,Y Ishihara,T Iwata,S Kikuchi,K Kitazato,D S Lauretta,G Libourel,B Marty,K Matsumoto,T Michikami,Y Mimasu,A Miura,O Mori,K Nakamura-Messenger,N Namiki,A N Nguyen,L R Nittler,H Noda,R Noguchi,N Ogawa,G Ono,M Ozaki,H Senshu,T Shimada,Y Shimaki,K Shirai,S Soldini, T Takahashi,Y Takei,H Takeuchi,R Tsukizaki,K Wada,Y Yamamoto,K Yoshikawa,K Yumoto,M E Zolensky,S Nakazawa,F Terui,S Tanaka,T Saiki,M Yoshikawa,S Watanabe,Y Tsuda

SCIENCE（2022）

引用 80|浏览34

暂无评分

摘要

The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect samples of surface and subsurface material, the latter exposed by an artificial impact. We present images of the second touchdown site, finding that ejecta from the impact crater was present at the sample location. Surface pebbles at both landing sites show morphological variations ranging from rugged to smooth, similar to Ryugu's boulders, and shapes from quasi-spherical to flattened. The samples were returned to Earth on 6 December 2020. We describe the morphology of >5 grams of returned pebbles and sand. Their diverse color, shape, and structure are consistent with the observed materials of Ryugu; we conclude that they are a representative sample of the asteroid.

查看译文

关键词

asteroid,sand,ryugu,particles,situ observation

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要