Astronomy:(471288) 2011 GM27
| Discovery[1] | |
|---|---|
| Discovery site | La Silla Obs. (809) |
| Discovery date | 2 April 2011 |
| Designations | |
| (471288) 2011 GM27 | |
| Minor planet category | TNO · cubewano[2] |
| Orbital characteristics[3] | |
| Epoch 1 July 2021 (JD 2459396.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 14.08 yr (5,141 d) |
| |{{{apsis}}}|helion}} | 44.638 AU |
| |{{{apsis}}}|helion}} | 42.363 AU |
| 43.500 AU | |
| Eccentricity | 0.0261 |
| Orbital period | 286.91 yr (104,794 d) |
| Mean anomaly | 98.325° |
| Mean motion | 0° 0m 12.24s / day |
| Inclination | 13.028° |
| Longitude of ascending node | 257.25° |
| 194.69° | |
| Physical characteristics | |
| Mean diameter | 443 km (est.)[2] 460 km (est.)[4] |
| Geometric albedo | 0.06 (est.)[4] 0.09 (est.)[2] |
| Absolute magnitude (H) | 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]
References
- ↑ 1.0 1.1 "471288 (2011 GM27)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=471288. Retrieved 18 July 2021.
- ↑ 2.0 2.1 2.2 2.3 2.4 Johnston, Wm. Robert (18 August 2020). "Asteroids with Satellites Database – (508869) 2002 VT130". Johnston's Archive. http://www.johnstonsarchive.net/astro/astmoons/am-508869.html. Retrieved 18 July 2021.
- ↑ 3.0 3.1 3.2 3.3 "JPL Small-Body Database Browser: 471288 (2011 GM27)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2471288. Retrieved 18 July 2021.
- ↑ 4.0 4.1 Brown, Michael E.. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 18 July 2021.
- ↑ "On the discovery and precovery of Trans-Neptunian Objects from SDSS images". pp. 1–2. http://talk.galaxyzoo.org/#/boards/BGZ0000007/discussions/DGZ000116c. Retrieved 8 March 2015.
External links
- (471288) 2011 GM27 at the JPL Small-Body Database
- (471288) 2011 GM27 at AstDyS-2, Asteroids—Dynamic Site
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