Cellinoid shape model for Hipparcos data

•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 shap...

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Bibliographic Details
Published in:Icarus (New York, N.Y. 1962) N.Y. 1962), 2016-03, Vol.267, p.24-33
Main Authors: Lu, Xiao-Ping, Cellino, Alberto, Hestroffer, Daniel, Ip, Wing-Huen
Format: Article
Language:English
Subjects:
Asteroids
Asteroids, rotation
Ellipsoids
Error analysis
Mathematical models
Neighbouring
Photometry
Physical properties
Rotational
Sciences of the Universe
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Summary:•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.
ISSN:0019-1035
1090-2643
DOI:10.1016/j.icarus.2015.12.006