文章基本信息

标题：A Single-chord Stellar Occultation by the Extreme Trans-Neptunian Object (541132) Leleākūhonua
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作者：Marc W.Buie ; Rodrigo Leiva ; John M.Keller 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：159
期号：5
页码：3134-3144
DOI：10.3847/1538-3881/ab8630
语种：English
出版社：American Institute of Physics
摘要：A stellar occultation by the extreme large-perihelion trans-Neptunian object (541132) Leleākūhonua (also known by the provisional designation of 2015 TG387) was predicted by the Lucky Star project and observed with the Research and Education Collaborative Occultation Network on 2018 October 20 UT.A single detection and a nearby nondetection provide constraints for the size and albedo.When a circular profile is assumed, the radius is $r={110}_{-10}^{+14}$ km, corresponding to a geometric albedo ${p}_{V}={0.21}_{-0.05}^{+0.03}$, for an adopted absolute magnitude of HV = 5.6, typical of other objects in dynamically similar orbits.The occultation also provides a high-precision astrometric constraint.
关键词：Trans-Neptunian objects;Detached objects;Stellar occultation;Astrometry