Astronomy:2012 GX17
| Discovery | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery date | 14 April 2012 |
| Designations | |
| 2012 GX17 | |
| Minor planet category | |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 2930 days (8.02 yr) |
| |{{{apsis}}}|helion}} | 57.826 AU (8.6506 Tm) |
| |{{{apsis}}}|helion}} | 16.9434206 AU (2.53469964 Tm) |
| 37.3849220 AU (5.59270473 Tm) | |
| Eccentricity | 0.5467846 |
| Orbital period | 228.59 yr (83491.6 d) |
| Mean anomaly | 49.28874° |
| Mean motion | 0° 0m 15.523s / day |
| Inclination | 32.53975° |
| Longitude of ascending node | 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 |
| Geometric albedo | 0.5–0.05 (assumed) |
| Absolute magnitude (H) | 7.6 |
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
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
- ↑ 1.0 1.1 "MPC List of Centaurs". Minor Planet Center. International Astronomical Union. http://www.minorplanetcenter.net/iau/lists/Centaurs.html.
- ↑ 2.0 2.1 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. doi:10.1051/0004-6361/201220377. Bibcode: 2012A&A...547L...2D.
- ↑ 3.0 3.1 "MPC data on 2012 GX17". Minor Planet Center. International Astronomical Union. http://www.minorplanetcenter.net/db_search/show_object?object_id=2012+GX17&commit=Show.
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
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