is a minor body classified as a centaur and trans-Neptunian object by the Minor Planet Center. The object was once considered a promising Neptune L5 trojan candidate.
Discovery was discovered on 14 April 2012 by the Pan-STARRS 1 telescope, observing from Haleakala, Hawaii.
Orbit follows a rather eccentric orbit (0.55) with a semi-major axis of 37.4 AU. This object also has high orbital inclination (32.5º).
Physical properties 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, 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 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)