 2002 GB32 is seen lower right in blue with hypothetical Planet Nine in green | |
| Discovery | |
|---|---|
| Discovered by | M. W. Buie |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 7 April 2002 |
| Designations | |
| MPC designation | 2002 GB32 |
| Minor planet category | TNO · SDO distant · detached |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 12.96 yr (4,733 days) |
| Aphelion | 402.66 AU |
| Perihelion | 35.347 AU |
| Semi-major axis | 219.01 AU |
| Eccentricity | 0.8386 |
| Orbital period (sidereal) | 3241.10 yr (1,183,810 days) |
| Mean anomaly | 0.3780° |
| Mean motion | 0° 0 1.08 / day |
| Inclination | 14.176° |
| Longitude of ascending node | 176.99° |
| Argument of perihelion | 37.158° |
| Physical characteristics | |
| Dimensions | 122 km (calculated) |
| Geometric albedo | 0.09 (assumed) |
| Absolute magnitude (H) | 7.8 |
2002 GB32, is a trans-Neptunian object from the scattered disc in the outermost region of the Solar System, approximately 122 kilometers in diameter. It was first observed on 7 April 2002, by American astronomer Marc Buie at Cerro Tololo Observatory in Chile.
Description
2002 GB32 belongs to a small number of detached objects with perihelion distances of 30 AU or more, and semi-major axis of 200 AU or more. Such objects can not reach such orbits without some perturbing object, which lead to the speculation of Planet Nine.
This minor planet orbits the Sun at a distance of 35.3–402.7 AU once every 3,241 years and 1 month (1,183,810 days). Its orbit has an eccentricity of 0.84 and an inclination of 14° with respect to the ecliptic.
Based on an absolute magnitude of 7.8 and an assumed albedo of 0.09, the Johnston's Archive calculated a mean-diameter of 122 kilometers.
See also
References
- ^ "2002 GB32". Minor Planet Center. Retrieved 17 October 2017.
- ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 14 October 2017.
- ^ "JPL Small-Body Database Browser: (2002 GB32)" (2015-03-23 last obs.). Jet Propulsion Laboratory. Retrieved 17 October 2017.
- ^ "List of known Trans-Neptunian Objects". Johnston's Archive. Retrieved 14 October 2017.
- minorplanetcenter.net: q>30, a>200
External links
- List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
- List of known Trans-Neptunian Objects, Johnston's Archive
- 2002 GB32 at AstDyS-2, Asteroids—Dynamic Site
- 2002 GB32 at the JPL Small-Body Database
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