Astronomy:2012 GX17

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2012 GX17
Discovery
Discovered byPan-STARRS 1
Discovery date14 April 2012
Designations
2012 GX17
Minor planet category
Orbital characteristics
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 1
Observation arc2930 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)
Eccentricity0.5467846
Orbital period228.59 yr (83491.6 d)
Mean anomaly49.28874°
Mean motion0° 0m 15.523s / day
Inclination32.53975°
Longitude of ascending node209.23931°
243.62742°
Earth MOID16.0869 AU (2.40657 Tm)
Jupiter MOID12.6178 AU (1.88760 Tm)
Physical characteristics
Dimensions60–200 km
Geometric albedo0.5–0.05 (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. 1.0 1.1 "MPC List of Centaurs". Minor Planet Center. International Astronomical Union. http://www.minorplanetcenter.net/iau/lists/Centaurs.html. 
  2. 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. Bibcode2012A&A...547L...2D. 
  3. 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