Cellinoid shape model for Hipparcos data

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题名:	Cellinoid shape model for Hipparcos data
作者:	葉永烜;Lu, Xiao-Ping;Cellino, Alberto;Hestroffer, Daniel;Ip, Wing-Huen
贡献者:	理學院天文研究所
关键词:	Asteroids;Asteroids, rotation;Ellipsoids;Error analysis;Mathematical models;Neighbouring;Photometry;Physical properties;Rotational;Sciences of the Universe
日期:	2016-03-15
上传时间:	2026-04-21 14:50:25 (UTC+8)
出版者:	Academic Press Inc.;Elsevier Inc
摘要:	摘要： •Cellinoid shape model consisting of eight octants from eight ellipsoids.•Search physical parameters of asteroids from sparse photometric data.•Error propagation, simulated numerical test and hipparcos data. Being intermediate between a regular triaxial ellipsoid shape and a more complex convex shape, the so-called “cellinoid” shape model consists of eight octants of eight ellipsoids with the constraint that neighbouring octants share two common axes. The resulting variety of possible shapes, obtained at the cost of only three extra parameters to be added to models of regular ellipsoids, can be employed to efficiently simulate asteroids with irregular shapes. This article shows how the cellinoid shape model can be applied to the inversion of sparse photometric data, such as Hipparcos data. In order to make the model more efficient and convenient to use, an error analysis is discussed and numerically confirmed. Finally, we determine physical parameters of several asteroids, including their shape, rotational period and pole orientation, by applying our model to Hipparcos data. 出版者： Elsevier Inc 出版日期： 2016-03-15 出處： Icarus (New York, N.Y. 1962), 2016-03, Vol.267, p.24-33 資源來源： ScienceDirect 版權： 2015 Elsevier Inc. 版權： licence_http://creativecommons.org/publicdomain/zero 識別號： ISSN: 0019-1035 識別號： EISSN: 1090-2643 識別號： DOI: 10.1016/j.icarus.2015.12.006
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