2012 GX17

Centaur August 2020 yes #C2E0FF 2012 GX 17 Pan-STARRS 1 14 April 2012 2012 GX 17 TNO Centaur 31 May 2020 (JD 2459000.5) 57.826 AU Tm on 16.9434206 AU Tm on 37.3849220 AU Tm on 0.5467846 228.59 yr (83491.6 d) 32.53975° 209.23931° 49.28874° 243.62742° 60–200 km 0.5–0.05 (assumed) 7.6 0.00431181 ms / day 2930 days (8.02 yr) 1 16.0869 AU Tm on 12.6178 AU Tm on 2012 GX 17 is a minor body classified as a centaur and trans-Neptunian object by the Minor Planet Center. http://www.minorplanetcenter.net/iau/lists/Centaurs.html International Astronomical Union Minor Planet Center 2016-02-22 MPC List of Centaurs The object was once considered a promising Neptune L5 trojan candidate.de la Fuente Marcos C. de la Fuente Marcos R. Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17 Astronomy and Astrophysics 547 L2 10.1051/0004-6361/201220377 1210.3466 2012A&A...547L...2D November 2012 118622987 Discovery 2012 GX 17 was discovered on 14 April 2012 by the Pan-STARRS 1 telescope, observing from Haleakala, Hawaii. Orbit 2012 GX 17 follows a rather eccentric orbit (0.55) with a semi-major axis of 37.4 AU.http://www.minorplanetcenter.net/db_search/show_object?object_id=2012+GX17&commit=Show MPC data on 2012 GX17 International Astronomical Union Minor Planet Center 2016-02-22 This object also has high orbital inclination (32.5º). Physical properties 2012 GX 17 is a rather large minor body with an absolute magnitude of 7.6 which gives a characteristic diameter of 60–200 km for an assumed albedo in the range 0.5–0.05. Former Neptune trojan candidate Initially, 2012 GX 17 was considered to be a promising Neptune trojan candidate, based on a very preliminary determination of 30.13 AU for its semi-major axis. However, the true value is much larger (37.4 AU) and it is now classified as a trans-Neptunian object. References External links Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17 by de la Fuente Marcos, C., & de la Fuente Marcos, R. 2012, Astronomy and Astrophysics, Volume 547, id.L2, 7 pp. Early discovery note 2012 GX 17 data at MPC IAU list of centaurs and scattered-disk objects IAU list of trans-neptunian objects Another list of TNOs The Long Term Dynamical Stability of the Known Neptune Trojans, Jack Lang Soutter, Master of Science thesis (not a Neptune trojan) 3602676 # Category:Minor planet object articles (unnumbered) # 20120414