2012 GX17
| Discovery | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery date | April 14, 2012 |
| Designations | |
| 2012 GX17 | |
| Centaur | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 1066 days (2.92 yr) |
| Aphelion | 58.496 AU (8.7509 Tm) |
| Perihelion | 16.973 AU (2.5391 Tm) |
| 37.734 AU (5.6449 Tm) | |
| Eccentricity | 0.55020 |
| 231.80 yr (84664.3 d) | |
| 41.574° | |
| 0° 0m 15.308s /day | |
| Inclination | 32.488° |
| 209.24° | |
| 244.11° | |
| Earth MOID | 16.1167 AU (2.41102 Tm) |
| Jupiter MOID | 12.652 AU (1.8927 Tm) |
| Physical characteristics | |
| Dimensions | 55-180 km |
| 0.5-0.05 (assumed) | |
| 7.8 | |
2012 GX17, also written as 2012 GX17, is a minor body classified as centaur by the Minor Planet Center upon discovery. [2] The object is also a promising Neptune L5 trojan candidate.[3]
Discovery
2012 GX17 was discovered on April 14, 2012 by the Pan-STARRS 1 telescope, observing from Haleakala, Hawaii.[2]
Orbit
2012 GX17 follows a rather eccentric orbit (0.41) with a semi-major axis of 30.13 AU.[4] This object also has high orbital inclination (35.3º).[4] Unfortunately, its orbit is not well determined as it is currently (November 2012) based on 10 observations with a data-arc span of 4 days.[1]
Physical properties
2012 GX17 is a rather large minor body with an absolute magnitude of 7.8 which gives a characteristic diameter of 55–180 km for an assumed albedo in the range 0.5-0.05.[1]
Neptune trojan candidate
Based on its current heliocentric orbit, 2012 GX17 follows a tadpole orbit around Neptune's L5 point. Giving the fact that its orbit is, at present, poorly determined, the object is a promising Neptune trojan candidate.[3] Simulations suggest that it is dynamically unstable like Neptune L5 trojan 2004 KV18. If confirmed, this object could be the highest inclination Neptune trojan.
References
- ^ a b c "JPL Small-Body Database Browser: (2012 GX17)". Jet Propulsion Laboratory. Retrieved 1 April 2016.
- ^ a b "MPC List of Centaurs". Minor Planet Center. International Astronomical Union. Retrieved 2016-02-22.
- ^ a b 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.
- ^ a b "MPC data on 2012 GX17". Minor Planet Center. International Astronomical Union. Retrieved 2016-02-22.
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
- 2012 GX17 at the JPL Small-Body Database
