Discovery [1] | |
---|---|
Discovery site | La Silla Obs. ( 809) |
Discovery date | 2 April 2011 |
Designations | |
(471288) 2011 GM27 | |
TNO · cubewano [2] | |
Orbital characteristics [3] | |
Epoch 1 July 2021 ( JD 2459396.5) | |
Uncertainty parameter 2 | |
Observation arc | 14.08 yr (5,141 d) |
Aphelion | 44.638 AU |
Perihelion | 42.363 AU |
43.500 AU | |
Eccentricity | 0.0261 |
286.91 yr (104,794 d) | |
98.325 ° | |
0° 0m 12.24s / day | |
Inclination | 13.028° |
257.25° | |
194.69° | |
Physical characteristics | |
Mean diameter | 443
km (est.)
[2] 460 km (est.) [4] |
0.06 (est.)
[4] 0.09 (est.) [2] | |
5.32 [3] | |
(471288) 2011 GM27 ( provisional designation 2011 GM27) is a trans-Neptunian object (TNO) in the Kuiper belt, classified as a hot classical Kuiper belt object. [2] It was discovered on 2 April 2011, at ESO's La Silla Observatory in Chile. [1] With an absolute magnitude of 5.32, [3] a geometric albedo of between 0.06 to 0.09 (a typical value) would mean it has a diameter of about 450 kilometers (280 mi). [2]
2011 GM27 orbits the Sun at a distance of 42.4–44.6 AU once every 286 years and 11 months (104,794 days; semi-major axis of 43.5 AU). Its orbit has an eccentricity of 0.03 and an inclination of 13 ° with respect to the ecliptic. [3]
It orbits slightly outside a 3:5 resonance with Neptune, taking 16 years (5.5% of its orbit) longer to orbit the Sun than a body in 3:5 resonance. Precovery observations exist dating back to 2006 in SDSS data. [5]