Photometric analysis for the spin parameters and shapes of asteroids (362) Havnia and (506) Marion

	Photometric analysis for the spin parameters and shapes of asteroids (362) Havnia and (506) Marion
	Wang XB(王晓彬)1,2 ; Muinonen, Karri 3,4; Wang YB(王夷博)1,5
刊名	PLANETARY AND SPACE SCIENCE
	2015-12
卷号	118 页码:242-249
关键词	Asteroids Photometric data Spin parameters Convex shape Uncertainty
ISSN号	0032-0633
通讯作者	Wang, XB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The physical properties of asteroids, such as their spin and shape, are very important for understanding the formation and evolution of the entire asteroid belt, as well as the individual asteroid itself. However, only a small part of asteroids had been determined accurately for their spin parameters and shapes due to lack of data or narrow aspect angle distribution of dataset. In the present paper, the spin parameters and convex shapes of two C-type main-belt asteroids (362) Havnia and (506) Marion are analyzed using the convex inversion method and the virtual-photometry Monte Carlo method. A pair of poles are found for (362) Havnia at (96 degrees. 2(-2.0)(+3.0), + 38 degrees. 8(-2.4)(+6.8)) and (273 degrees. 0(-6.5)(+1.3), + 40 degrees. 0(-9.9)(+1.2)) in ecliptic coordinates, the spin period values corresponding to the two poles are 16. 918773(-6.4(-6))(+2.8(-5)) h (here +2.8(-5) represents +2.8 x 10(-5)) and 16. 918935(-4.3(-5))(+1.2(-5)) h, respectively. Similarly, two candidate poles are found for (506) Marion at (88 degrees. 0(-0.3)(+1.3), + 22 degrees. 3(-1.5)(+1.3)) and (264 degrees. 5(-0.03)(+1.2), - 7 degrees. 5(-0.92)(+1.1)). The spin periods for the two poles are 13. 549826(-9.8(-6))(+1.2(-5)) h and 13.549751(-5.9(-6))(+1.3(-5)) h. The shapes of Havnia for the pair of poles approximate to Maclaurin spheroids. Whereas the convex shapes of Marion for the two poles are prolate shapes, and it rotates around the longest axis. The significant divergence of weight coefficients c for Havina and Marion implies different materials on the two asteroids' surface. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LIGHTCURVE INVERSION ; OPTIMIZATION METHODS ; MODELS ; SET
收录类别	SCI ; EI
原文出处	http://www.sciencedirect.com/science/article/pii/S0032063315002317
语种	英语
WOS记录号	WOS:000370460100029
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6806]
专题	云南天文台_系外行星研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, CAS, P.O. Box 110, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650011, China 3.Department of Physics, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland 4.Finnish Geospatial Research Institute, P.O. Box 15, FI-02431 Masala, Finland 5.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Wang XB,Muinonen, Karri,Wang YB. Photometric analysis for the spin parameters and shapes of asteroids (362) Havnia and (506) Marion[J]. PLANETARY AND SPACE SCIENCE,2015,118:242-249.
APA	Wang XB,Muinonen, Karri,&Wang YB.(2015).Photometric analysis for the spin parameters and shapes of asteroids (362) Havnia and (506) Marion.PLANETARY AND SPACE SCIENCE,118,242-249.
MLA	Wang XB,et al."Photometric analysis for the spin parameters and shapes of asteroids (362) Havnia and (506) Marion".PLANETARY AND SPACE SCIENCE 118(2015):242-249.