(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]
| 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 | |
| 443 km (est.)[2] 460 km (est.)[4] | |
| 0.06 (est.)[4] 0.09 (est.)[2] | |
| 5.32[3] | |
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]
- ^ a b “471288 (2011 GM27)”. Minor Planet Center. Retrieved 18 July 2021.
- ^ a b c d e Johnston, Wm. Robert (18 August 2020). “Asteroids with Satellites Database – (508869) 2002 VT130”. Johnston’s Archive. Retrieved 18 July 2021.
- ^ a b c d “JPL Small-Body Database Browser: 471288 (2011 GM27)” (2020-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 18 July 2021.
- ^ a b Brown, Michael E. “How many dwarf planets are there in the outer solar system?”. California Institute of Technology. Retrieved 18 July 2021.
- ^ “On the discovery and precovery of Trans-Neptunian Objects from SDSS images”. talk.galaxyzoo.org. pp. 1–2. Retrieved 8 March 2015.
- (471288) 2011 GM27 at the JPL Small-Body Database
- (471288) 2011 GM27 at AstDyS-2, Asteroids—Dynamic Site
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