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Photometric Observation and Modeling Study of the Asteroid (26) Proserpina

机译:小行星(26)Proserpina的光度观察和建模研究

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摘要

We present the new CCD observations on the asteroid (26) Proserpina performed between 2011 December and 2012 February. Based upon the new observations, a synodic rotation period of (13.107 ± 0.002) h is obtained. Using all the light curves available sofar, the rotation vector, rotation period, and the shape model of the asteroid are determined with the convex-hull inversion method. Further more, a bootstrap method is applied to estimating the uncertainties of the rotation parameters. We derive a pair of possible rotation poles for (26) Proserpina, and believe that it has a retrograde rotation. The rotation poles are determined to be λ_1 = 90.8° ± 1.4°, β_1 = ?53.1° ± 3.2°, and λ_2 = 259.3° ± 2.2°, β_2 = ?62.0° ± 2.0°. The sidereal rotation periods corresponding to the two poles are almost the same as (13.109777 ± 3.8 × 10~(?6)) h. And corresponding to this pair of rotation poles, the convex-hull shapes of the asteroid are the mirror images of each other.
机译:我们介绍了2011年12月至2012年2月之间对小行星(26)Proserpina进行的新CCD观测。根据新的观察结果,可以得出同步旋转周期为(13.107±0.002)h。使用所有可用的光曲线,利用凸包反演方法确定小行星的旋转矢量,旋转周期和形状模型。此外,自举方法被应用于估计旋转参数的不确定性。我们为(26)Proserpina导出了一对可能的旋转极点,并认为它具有逆行旋转。旋转极被确定为λ_1= 90.8°±1.4°,β_1=α53.1°±3.2°和λ_2= 259.3°±2.2°,β_2=α62.0°±2.0°。与两个极点相对应的恒星旋转周期几乎等于(13.109777±3.8×10〜(?6))h。对应于这对旋转极,小行星的凸包形状是彼此的镜像。

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