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DOI10.1126/science.aaz1701
An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime
Arakawa M.; Saiki T.; Wada K.; Ogawa K.; Kadono T.; Shirai K.; Sawada H.; Ishibashi K.; Honda R.; Sakatani N.; Iijima Y.; Okamoto C.; Yano H.; Takagi Y.; Hayakawa M.; Michel P.; Jutzi M.; Shimaki Y.; Kimura S.; Mimasu Y.; Toda T.; Imamura H.; Nakazawa S.; Hayakawa H.; Sugita S.; Morota T.; Kameda S.; Tatsumi E.; Cho Y.; Yoshioka K.; Yokota Y.; Matsuoka M.; Yamada M.; Kouyama T.; Honda C.; Tsuda Y.; Watanabe S.; Yoshikawa M.; Tanaka S.; Terui F.; Kikuchi S.; Yamaguchi T.; Ogawa N.; Ono G.; Yoshikawa K.; Takahashi T.; Takei Y.; Fujii A.; Takeuchi H.; Yamamoto Y.; Okada T.; Hirose C.; Hosoda S.; Mori O.; Shimada T.; Soldini S.; Tsukizaki R.; Iwata T.; Ozaki M.; Abe M.; Namiki N.; Kitazato K.; Tachibana S.; Ikeda H.; Hirata N.; Hirata N.; Noguchi R.; Miura A.
发表日期2020
ISSN0036-8075
卷号368期号:6486
英文摘要The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2's Small Carry-on Impactor. The impact produced an artificial crater with a diameter >10 meters, which has a semicircular shape, an elevated rim, and a central pit. Images of the impact and resulting ejecta were recorded by the Deployable CAMera 3 for >8 minutes, showing the growth of an ejecta curtain (the outer edge of the ejecta) and deposition of ejecta onto the surface. The ejecta curtain was asymmetric and heterogeneous and it never fully detached from the surface. The crater formed in the gravity-dominated regime; in other words, crater growth was limited by gravity not surface strength. We discuss implications for Ryugu's surface age. © 2020 American Association for the Advancement of Science. All rights reserved.
关键词asteroidcraterequipmentgravityimage analysisspacecraftarticlegravity
语种英语
来源机构Science
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/133582
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Arakawa M.,Saiki T.,Wada K.,et al. An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime[J]. Science,2020,368(6486).
APA Arakawa M..,Saiki T..,Wada K..,Ogawa K..,Kadono T..,...&Miura A..(2020).An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime.,368(6486).
MLA Arakawa M.,et al."An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime".368.6486(2020).
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