NEW INSIGHTS OF ASTEROID 4179 TOUTATIS USING CHINA CHANG'E-2 CLOSE FLYBY OPTICAL MEASUREMENTS
文献类型：期刊论文
| 作者 | Bu, Yanlong1; Tang, Geshi1; Di, KaiChang1; Fa, Wenzhe1; Hu, Tianjiang1; Ding, Chibiao1; Xu, Bin1; Liu, Bin1; Cao, Jianfeng1; Hu, Songjie1 |
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2015 |
| 卷号 | 149期号:1页码:11-23 |
| 关键词 | minor planets, asteroids: individual (Toutatis) planets and satellites: fundamental parameters planets and satellites: surfaces |
| 通讯作者 | Bu, YL (reprint author), Beijing Aerosp Control Ctr, Aerosp Flight Dynam Lab, POB 5130, Beijing 100094, Peoples R China. |
| 英文摘要 | The mysteries of near-Earth asteroid 4179 Toutatis have been more comprehensively unveiled by analyzing the optical images taken during the Chang'e-2 flyby in 2012. Compared with previous works, this paper concentrates on the photogrammetric relation between the Chang'e-2 spacecraft and Toutatis and the imaging shadow effect during the flyby. Accurate models of imaging and optical measurements are developed to study Toutatis's dimensions and rotational state at the time of imaging. As the illumination study shows, the shadowed region perpendicular to the long axis accounts for 27.78% of the Toutatis images, while the long axis of the body is fully captured. With a compensation on the shadow effect, the optical measurements reveal that Toutatis's long axis is 4354 +/- 56 m, the maximum length is 4391 +/- 56 m, and the spatial orientation described with the angles of direction cosine during the flyby is (126 degrees.13 +/- 0 degrees.29, 122 degrees.98 +/- 0 degrees.21, 126 degrees.63 +/- 0 degrees.46). Furthermore, a new triaxial ellipsoid of 4354 x 1835 x 2216m and a volume of 7.5158 km(3) are proposed based on the previous Toutatis shape model. The effectiveness of the proposed method is validated, since typical features such as the neck and endpoints agree well with the results simultaneously observed by the ground radar. Moreover, it also potentially provides a feasible approach to precisely calculate the spin period of Toutatis. |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000347308300021 |
| 源URL | [http://ir.ceode.ac.cn/handle/183411/38528]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1.[Bu, Yanlong 2.Tang, Geshi 3.Cao, Jianfeng 4.Hu, Songjie 5.Yang, Cheng 6.Liu, Chuankai] Beijing Aerosp Control Ctr, Aerosp Flight Dynam Lab, Beijing 100094, Peoples R China 7.[Bu, Yanlong 8.Ding, Chibiao] Chinese Acad Sci, Inst Elect, Beijing 100190, Peoples R China 9.[Di, KaiChang 10.Xu, Bin |
| 推荐引用方式 GB/T 7714 | Bu, Yanlong,Tang, Geshi,Di, KaiChang,et al. NEW INSIGHTS OF ASTEROID 4179 TOUTATIS USING CHINA CHANG'E-2 CLOSE FLYBY OPTICAL MEASUREMENTS[J]. ASTRONOMICAL JOURNAL,2015,149(1):11-23. |
| APA | Bu, Yanlong.,Tang, Geshi.,Di, KaiChang.,Fa, Wenzhe.,Hu, Tianjiang.,...&Liu, Chuankai.(2015).NEW INSIGHTS OF ASTEROID 4179 TOUTATIS USING CHINA CHANG'E-2 CLOSE FLYBY OPTICAL MEASUREMENTS.ASTRONOMICAL JOURNAL,149(1),11-23. |
| MLA | Bu, Yanlong,et al."NEW INSIGHTS OF ASTEROID 4179 TOUTATIS USING CHINA CHANG'E-2 CLOSE FLYBY OPTICAL MEASUREMENTS".ASTRONOMICAL JOURNAL 149.1(2015):11-23. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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