High-resolution model of Asteroid 4179 Toutatis
High-resolution model of Asteroid 4179 Toutatis
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DOI：
10.1016/s0019-1035(02)00042-8
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发表时间：
2003-02-01
期刊：
影响因子：
3.2
通讯作者：
Scheeres, DJ
中科院分区：
文献类型：
--
作者：
Hudson, RS;Ostro, SJ;Scheeres, DJ
根据1992年和1996年获得的“高分辨率”雷达图像，图塔蒂斯的形状模型由39，996个面积大致相等的三角形面组成，由20，000个顶点的位置定义。这些将模型的平均空间分辨率定义为约34 m，明显优于哈德逊和Ostro（1995，Science 270，84-86）的模型（1600个顶点，分辨率84 m）。高分辨率模型揭示了复杂的线性特征以及分辨率极限的环形火山口状结构。在小行星的两个叶瓣上的重力斜率分布之间存在二分法。非环形山的特征可能是复杂的内部结构的表现，包括各种大小和形状的单片碎片，可能是由于在各种能量状态下的碰撞。然而，如果不进行广泛、深入、直接的检查，就不可能破译图塔蒂斯和其他小天体的内部结构和负责的碰撞历史。(C)2003 Elsevier Science（美国）。All rights reserved.
A model of the shape of Toutatis based on "high-resolution" radar images obtained in 1992 and 1996 consists of 39,996 triangular facets of roughly equal area, defined by the locations of 20,000 vertices. These define the average spatial resolution of the model as approximately 34 m, significantly finer than Hudson and Ostro's (1995, Science 270, 84-86) model (1600 vertices, resolution 84 m). The high-resolution model reveals complex linear features as well as circular crater-like structures down to the resolution limit. There is a dichotomy between the gravitational slope distributions on the asteroid's two lobes. The noncraterlike features may be the manifestation of complex interior configurations involving monolithic fragments with various sizes and shapes, presumably due to collisions in various energy regimes. However, it may be impossible to decipher the interior structure and responsible collisional history of Toutatis and other small objects without extended, intensive, direct examination. (C) 2003 Elsevier Science (USA). All rights reserved.