1. A Single-chord Stellar Occultation by the Extreme Trans-Neptunian Object (541132) Leleākūhonua
- Author
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Robert Weryk, Dave Herald, Naemi Fiechter, James J. Estes, Bruce Palmquist, Paola Mendoza, John Keller, Sherry Rennau, Ken Conway, Ryder Strauss, Olivia L. Ireland, Rodrigo Leiva, Emma D. Terris, Marc W. Buie, Ramsey Schar, Matthew A. MacDonald, Bruno Sicardy, Sean L. Haley, Mackenzie Dunham, J. J. Kavelaars, Robert H. Baker, Delsie McCrystal, Matthew Kehrli, Rima Givot, Joe Wise, Terry Bridges, Diana J. Swanson, Holly Werts, Elizabeth Wilde, Josselin Desmars, Bryan Dean, Jennifer N. Hayman, Erik M. Moore, Bruce Gowe, Cameron Glibbery, Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)
- Subjects
Absolute magnitude ,Physics ,[PHYS]Physics [physics] ,Chord (geometry) ,010504 meteorology & atmospheric sciences ,Star (game theory) ,Astronomy and Astrophysics ,Astrophysics ,Radius ,Albedo ,01 natural sciences ,Occultation ,Space and Planetary Science ,Geometric albedo ,trans-Neptunian objects ,0103 physical sciences ,stellar occultation ,astrometry ,Trans-Neptunian object ,Astrophysics - Instrumentation and Methods for Astrophysics ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,010303 astronomy & astrophysics ,detached objects ,0105 earth and related environmental sciences ,Astrophysics - Earth and Planetary Astrophysics - Abstract
A stellar occultation by the extreme large-perihelion trans-Neptunian object (541132) Lele\={a}k\={u}honua (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 H V = 5.6, typical of other objects in dynamically similar orbits. The occultation also provides a high-precision astrometric constraint., Comment: 7 figures
- Published
- 2020