2012 GX17
2012 GX17, also written as 2012 GX17, is a minor body classified as Centaur and Trans-Neptunian object by the Minor Planet Center. [1] The object was once considered a promising Neptune L5 trojan candidate.[2]
| Discovery | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery date | 14 April 2012 |
| Designations | |
| 2012 GX17 | |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 2930 days (8.02 yr) |
| Aphelion | 57.826 AU (8.6506 Tm) |
| Perihelion | 16.9434206 AU (2.53469964 Tm) |
| 37.3849220 AU (5.59270473 Tm) | |
| Eccentricity | 0.5467846 |
| 228.59 yr (83491.6 d) | |
| 49.28874° | |
| 0° 0m 15.523s / day | |
| Inclination | 32.53975° |
| 209.23931° | |
| 243.62742° | |
| Earth MOID | 16.0869 AU (2.40657 Tm) |
| Jupiter MOID | 12.6178 AU (1.88760 Tm) |
| Physical characteristics | |
| Dimensions | 60–200 km |
| 0.5–0.05 (assumed) | |
| 7.6 | |
Discovery
2012 GX17 was discovered on 14 April 2012 by the Pan-STARRS 1 telescope, observing from Haleakala, Hawaii.[1]
Orbit
2012 GX17 follows a rather eccentric orbit (0.55) with a semi-major axis of 37.4 AU.[3] This object also has high orbital inclination (32.5º).[3]
Physical properties
2012 GX17 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 GX17 was considered to be a promising Neptune trojan candidate,[2] 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
- "MPC List of Centaurs". Minor Planet Center. International Astronomical Union. Retrieved 22 February 2016.
- de la Fuente Marcos, C.; de la Fuente Marcos, R. (November 2012). "Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17". Astronomy and Astrophysics. 547: L2. arXiv:1210.3466. Bibcode:2012A&A...547L...2D. doi:10.1051/0004-6361/201220377. S2CID 118622987.
- "MPC data on 2012 GX17". Minor Planet Center. International Astronomical Union. Retrieved 22 February 2016.
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 GX17 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)
- 2012 GX17 at the JPL Small-Body Database