Optimization Methods for Asteroid Lightcurve Inversion: I. Shape Determination
Optimization Methods for Asteroid Lightcurve Inversion: I. Shape Determination
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DOI：
10.1006/icar.2001.6673
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发表时间：
2001-09
期刊：
影响因子：
3.2
通讯作者：
M. Kaasalainen;J. Torppa
中科院分区：
文献类型：
--
作者：
M. Kaasalainen;J. Torppa
摘要我们已经开发了新的方法来确定形状（和旋转分布），旋转周期和极方向（以及其他参数，例如，散射定律）从它们的光变曲线。本文主要研究形状确定。恢复的形状是通用的，而不是基于任何先前的形状模型的修改。我们用快速光线追迹算法生成了各种非凸体的测试光变曲线。我们表明，使用正定量有效地消除了明显的不适定性的问题。我们的方法可以得到凸壳，即使是强非凸的对象，也可以解决主要的凹。
Abstract We have developed new methods for determining the shapes (and albedo distributions), rotation periods, and pole directions (as well as other parameters, e.g., those of the scattering law) of asteroids from their lightcurves. This paper concentrates on shape determination. The recovered shapes are general and not based on modifications of any prior shape model. We produce test lightcurves of various nonconvex bodies with a fast ray-tracing algorithm. We show that the use of positive definite quantities effectively removes the apparent ill-posedness of the problem. Our methods can obtain convex hulls even for strongly nonconvex objects; major concavities can also be resolved.