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A fast ellipsoid model for asteroids inverted from lightcurves
Lu, Xiao-Ping1; Zhao, Hai-Bin2; You, Zhong1; Lu, XP (reprint author), Macau Univ Sci & Technol, Fac Informat Technol, Ave Wai Long, Taipa, Macau, Peoples R China. Email: xplu@must.edu.mo
2013-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume13Issue:4Pages:471-478
AbstractResearch about asteroids has recently attracted more and more attention, especially focusing on their physical structures, such as their spin axis, rotation period and shape. The long distance between observers on Earth and asteroids makes it impossible to directly calculate the shape and other parameters of asteroids, with the exception of Near Earth Asteroids and others that have passed by some space-crafts. Photometric measurements are still generally the main way to obtain research data on asteroids, i.e. the lightcurves recording the brightness and positions of asteroids. Supposing that the shape of the asteroid is a triaxial ellipsoid with a stable spin, a new method is presented in this article to reconstruct the shape models of asteroids from the lightcurves, together with other physical parameters. By applying a special curvature function, the method calculates the brightness integration on a unit sphere and Lebedev quadrature is employed for the discretization. Finally, the method searches for the optimal solution by the Levenberg-Marquardt algorithm to minimize the residual of the brightness. By adopting this method, not only can related physical parameters of asteroids be obtained at a reasonable accuracy, but also a simple shape model of an ellipsoid can be generated for reconstructing a more sophisticated shape model.
KeywordEllipsoid Model Lightcurves Photometric Shape: Asteroids
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1674-4527/13/4/008
WOS KeywordATMOSPHERELESS BODIES ; BRIGHTNESS VARIATIONS ; RADIATIVE-TRANSFER ; PHASE CURVES ; INVERSION ; SURFACES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000316788000008
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9930
Collection盱眙天文观测站
Corresponding AuthorLu, XP (reprint author), Macau Univ Sci & Technol, Fac Informat Technol, Ave Wai Long, Taipa, Macau, Peoples R China. Email: xplu@must.edu.mo
Affiliation1.Macau Univ Sci & Technol, Fac Informat Technol, Taipa, Macau, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Lu, Xiao-Ping,Zhao, Hai-Bin,You, Zhong,et al. A fast ellipsoid model for asteroids inverted from lightcurves[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(4):471-478.
APA Lu, Xiao-Ping,Zhao, Hai-Bin,You, Zhong,&Lu, XP .(2013).A fast ellipsoid model for asteroids inverted from lightcurves.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(4),471-478.
MLA Lu, Xiao-Ping,et al."A fast ellipsoid model for asteroids inverted from lightcurves".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.4(2013):471-478.
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