(762135) 2010 WG9

Trans-Neptunian object February 2018 yes (762135) 2010 WG 9 #C2E0FF 30 November 2010(discovery: first observation only) LaSilla–Quest Variability Srvy. La Silla Observatory (762135) 2010 WG 9 TNOcentaurdistant 4 September 2017 (JD 2458000.5) 3 6.22 yr (2,271 days) 87.037 AU 18.765 AU 52.901 AU 0.6453 384.77 yr (140,538 days) 10.821° 0.0026 ms / day 70.331° 92.065° 293.00° 1 100.81 km (calculated)112.7 61.9 km 263.8 0.1 h 0.074 0.0800.10 (assumed) B–R = 1.10B–V = 0.798 0.034V–R = 0.520 0.018 8.1 (762135) 2010 WG 9 is a high inclination, binary trans-Neptunian object and slow rotator from the outer Solar System, approximately 100 kilometers in diameter. It was first observed at ESO's La Silla Observatory in northern Chile on 30 November 2010. Orbit and classification 2010 WG 9 orbits the Sun at a distance of 18.8–87.0 AU once every 384 years and 9 months (140,538 days). Its orbit has an eccentricity of 0.65 and an inclination of 70° with respect to the ecliptic. As of October 2019, it is one of six known objects with inclination (i) > 60° and perihelion (q) > 15 AU, along with the first discovered 528219 2008 KV 42. Physical characteristics Rotation period A rotational lightcurve of 2010 WG 9 was obtained from photometric observations by the LaSilla–Quest Variability Survey at La Silla in Chile. Lightcurve analysis gave a rotation period of 263.8 hours with a brightness amplitude of 0.14 magnitude (U=2). It belongs to the top 200 slowest rotators known to exist. Diameter and albedo It measures 112.7 kilometers in diameter and its surface has an albedo of 0.074. The Collaborative Asteroid Lightcurve Link assumes a standard albedo of 0.10 and calculates a diameter of 100.81 kilometers based on an absolute magnitude of 8.1. Satellite 2010 WG 9's nature of being a binary TNO was first discovered on 19 December 2017 by B. Proudfoot, W. Grundy, and D. Spencer, using 300-second exposures taken with the Hubble Space Telescope. However, this discovery would not be announced publicly until 22 September 2026. The 2010 WG 9 binary system is similar to other TNO binary systems (such as 65489 Ceto and 66652 Borasisi) in the sense that both components share nearly equal sizes. The diameter of the companion is estimated to be 79 ± 43 km (49.1 ± 26.7 mi), with an orbital period of nearly 11 days.(762135) 2010 WG9 https://www.johnstonsarchive.net/astro/astmoons/am-762135.html 2026-09-26 www.johnstonsarchive.net References 2016-03-13 last obs. JPL Small-Body Database Browser: (2010 WG9) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3554395 Jet Propulsion Laboratory 25 July 2017 2010 WG9 Minor Planet Center http://www.minorplanetcenter.net/db_search/show_object?object_id=2010+WG9 25 July 2017 Custom query: i = 60 and q = 15+ Minor Planet Center http://minorplanetcenter.net/db_search/show_by_properties?perihelion_distance_min=15&inclination_min=60 26 July 2017 List of Known Trans-Neptunian Objects Johnston's Archive http://www.johnstonsarchive.net/astro/tnoslist.html 26 July 2017 2010 WG9 25 July 2017 David Rabinowitz Megan E. Schwamb Elena Hadjiyska Suzanne Tourtellotte Patricio Rojo July 2013 The Peculiar Photometric Properties of 2010 WG9: A Slowly Rotating Trans-Neptunian Object from the Oort Cloud The Astronomical Journal 146 1 10 2013AJ....146...17R 10.1088/0004-6256/146/1/17 1305.5134 119206739 6 James M. Bauer Tommy Grav Erin Blauvelt A. K. Mainzer Joseph R. Masiero Rachel Stevenson Emily Kramer Yan R. Fernández C. M. Lisse Roc M. Cutri Paul R. Weissman John W. Dailey Frank J. Masci Russel Walker Adam Waszczak Carrie R. Nugent Karen J. Meech Andrew Lucas George Pearman Ashlee Wilkins Jessica Watkins Shrinivas Kulkarni Edward L. Wright WISE Team PTF Team August 2013 Centaurs and Scattered Disk Objects in the Thermal Infrared: Analysis of WISE/NEOWISE Observations The Astrophysical Journal 773 1 11 2013ApJ...773...22B 10.1088/0004-637X/773/1/22 1306.1862 51139703 External links List Of Centaurs and Scattered-Disk Objects, Minor Planet Center 2010WG9 (2010 WG9) 3554395 762135 (762135) 2010 WG 9 Category:Centaurs (small Solar System bodies) Category:Damocloids Category:Slow rotating minor planets 20101130