NEW INSIGHTS OF ASTEROID 4179 TOUTATIS USING CHINA CHANG'E-2 CLOSE FLYBY OPTICAL MEASUREMENTS

	NEW INSIGHTS OF ASTEROID 4179 TOUTATIS USING CHINA CHANG'E-2 CLOSE FLYBY OPTICAL MEASUREMENTS
	Bu, Yanlong 1; Tang, Geshi 1; Di, KaiChang 1; Fa, Wenzhe 1; Hu, Tianjiang 1; Ding, Chibiao 1; Xu, Bin 1; Liu, Bin 1; Cao, Jianfeng 1; Hu, Songjie 1
刊名	ASTRONOMICAL JOURNAL
	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
内容类型	期刊论文
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.