Chang'e-2 spacecraft observations of asteroid 4179 Toutatis
Chang'e-2 spacecraft observations of asteroid 4179 Toutatis
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DOI：
10.1017/s1743921315008674
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
J. Ji;Yun Jiang;Yuhui Zhao;Su Wang;Liangliang Yu
中科院分区：
文献类型：
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作者：
J. Ji;Yun Jiang;Yuhui Zhao;Su Wang;Liangliang Yu
2012年12月13日，嫦娥二号成功飞越近地小行星4179 Toutatis，距离小行星表面最近距离为770米。观察表明，Toutatis具有不规则的表面，其形状类似于一个较小的叶（头）和一个较大的叶（体）的姜根。这种双叶状的形状表明了一种接触双星起源。此外，超过3米的高分辨率图像提供了关于这颗小行星的许多新发现，例如大瓣末端800米的凹陷，颈部附近明显垂直的轮廓，巨石，表明Toutatis可能是一颗碎石堆小行星。嫦娥2号的观测结果为我们提供了有关这颗小行星的地质特征和形成演化的新见解。最后，简要介绍了中国未来的小行星任务构想。
Abstract On 13 December 2012, Chang'e-2 completed a successful flyby of the near-Earth asteroid 4179 Toutatis at a closest distance of 770 meters from the asteroid's surface. The observations show that Toutatis has an irregular surface and its shape resembles a ginger-root of a smaller lobe (head) and a larger lobe (body). Such bilobate shape is indicative of a contact binary origin for Toutatis. In addition, the high-resolution images better than 3 meters provide a number of new discoveries about this asteroid, such as an 800-meter depression at the end of the large lobe, a sharply perpendicular silhouette near the neck region, boulders, indicating that Toutatis is probably a rubble-pile asteroid. Chang'e-2 observations have significantly revealed new insights into the geological features and the formation and evolution of this asteroid. In final, we brief the future Chinese asteroid mission concept.