The ginger-shaped asteroid 4179 Toutatis: New observations from a successful flyby of chang'e-2

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题名:	The ginger-shaped asteroid 4179 Toutatis: New observations from a successful flyby of chang'e-2
作者:	葉永烜;Huang, Jiangchuan;Ji, Jianghui;Ye, Peijian;Wang, Xiaolei;Yan, Jun;Meng, Linzhi;Wang, Su;Li, Chunlai;Li, Yuan;Qiao, Dong;Zhao, Wei;Zhao, Yuhui;Zhang, Tingxin;Liu, Peng;Jiang, Yun;Rao, Wei;Li, Sheng;Huang, Changning;Ip, Wing-Huen;Hu, Shoucun;Zhu, Menghua;Yu, Liangliang;Zou, Yongliao;Tang, Xianglong;Li, Jianyang;Zhao, Haibin;Huang, Hao;Jiang, Xiaojun;Bai, Jinming
贡献者:	理學院天文研究所
关键词:	639/33;639/33/34;639/33/445/848;704/445;Asteroids;Astronomy;Cameras;Earth;Engineering;Humanities and Social Sciences;multidisciplinary;Neck;Observatories;Science
日期:	2013-12-12
上传时间:	2026-04-21 14:22:38 (UTC+8)
出版者:	Nature Publishing Group;London: Springer Science and Business Media LLC
摘要:	摘要： On 13 December 2012, Chang'e-2 conducted a successful flyby of the near-Earth asteroid 4179 Toutatis at a closest distance of 770 ± 120 meters from the asteroid's surface. The highest-resolution image, with a resolution of better than 3 meters, reveals new discoveries on the asteroid, e.g., a giant basin at the big end, a sharply perpendicular silhouette near the neck region and direct evidence of boulders and regolith, which suggests that Toutatis may bear a rubble-pile structure. Toutatis' maximum physical length and width are (4.75 × 1.95 km) ±10%, respectively and the direction of the + z axis is estimated to be (250 ± 5°, 63 ± 5°) with respect to the J2000 ecliptic coordinate system. The bifurcated configuration is indicative of a contact binary origin for Toutatis, which is composed of two lobes (head and body). Chang'e-2 observations have significantly improved our understanding of the characteristics, formation and evolution of asteroids in general. 其他題名： Sci Rep 出版者： London: Springer Science and Business Media LLC 出版日期： 2013-12-12 出處： Scientific Reports, 2013-12, Vol.3 (1), p.3411-, Article 3411 資源來源： Publicly Available Content Database 版權： The Author(s) 2013 版權： Copyright Nature Publishing Group Dec 2013 版權： Copyright © 2013, Macmillan Publishers Limited. All rights reserved 2013 Macmillan Publishers Limited. All rights reserved 識別號： ISSN: 2045-2322 識別號： EISSN: 2045-2322 識別號： DOI: 10.1038/srep03411 識別號： PMID: 24336501
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