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Stellar Occultation by the Resonant Trans-Neptunian Object (523764) 2014 WC510 Reveals a Close Binary TNO
The Planetary Science Journal Pub Date : 2020-09-27 , DOI: 10.3847/psj/abb23d
Rodrigo Leiva 1 , Marc W. Buie 1 , John M. Keller 2 , Lawrence H. Wasserman 3 , JJ Kavelaars 4 , Terry Bridges 5, 6 , Sean L. Haley 2 , Ryder Strauss 2 , Elizabeth Wilde 2 , Robert Weryk 7 , Pierre Kervella 8 , Robert Baker 9, 10 , Stephen Alan Bock 9 , Ken Conway 9, 11 , Juan M. Cota Jr. 9, 12 , James J. Estes 9, 13 , Mara L. Garca 9, 12 , Matthew Kehrli 9, 14 , Andrew McCandless 9, 12 , Keitha McCandless 9, 12 , Edgar Self 9, 12 , Cole Settlemire 9, 12 , Diana J. Swanson 9, 14 , Doug Thompson 9, 15 , J. A. Wise 9, 16
Affiliation  

We report on the stellar occultation by (523764) 2014 WC 510 observed on 2018 December 1 UT. This occultation campaign was part of the Research and Education Collaborative Occultation Network (RECON), a network of small telescopes spread over 2000 km in western USA and Canada. Light curves from six stations revealed three groups of two or more consecutive flux drops correlated in time between adjacent stations. A Bayesian model comparison reveals that a model with a double object occulting a double star is favored over alternative models considered. For the statistically favored model, we determined that the primary component of the object has a diameter d p = 181 ± 16 km and the secondary d s = 138 ± 32 km, assuming identical geometric albedo between the two components. The two components have a projected separation of 349 ± 26 km. Adopting an absolute magnitude for the system of H V = 7....

中文翻译:

恒星海王星掩星的恒星掩星(523764)2014 WC510显示了紧密的二进制TNO

我们报告了在2018年12月1日UT观测到的(523764)2014 WC 510的恒星掩星。这项掩星活动是“研究与教育协作掩星网络”(RECON)的一部分,RECON是一个小型望远镜网络,在美国西部和加拿大分布了2000公里。来自六个站点的光曲线揭示了两组相邻的站点之间在时间上相关的两个或多个连续的磁通量下降。贝叶斯模型的比较表明,与双星掩盖双星的模型相比,替代模型更受青睐。对于具有统计学意义的模型,我们假设对象的主要成分的直径dp = 181±16 km,次要ds = 138±32 km,假定这两个成分之间的几何反射率相同。这两个部分的预计间距为349±26 km。
更新日期:2020-09-28
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