2015 RY245
Trans-Neptunian object
From Wikipedia, the free encyclopedia
2015 RY245, also known as o5s13, is a trans-Neptunian object from the scattered disc of the outermost reaches of the Solar System, approximately 78 kilometers in diameter. It was discovered on 9 September 2015, by the Outer Solar System Origins Survey using the Canada–France–Hawaii Telescope at Mauna Kea Observatories, Hawaii, United States.[2]
| Discovery[1][2] | |
|---|---|
| Discovered by | OSSOS |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 9 September 2015 |
| Designations | |
| 2015 RY245 | |
| o5s13[3] | |
| TNO[1] · SDO[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 5 | |
| Observation arc | 1.47 yr (538 days) |
| Aphelion | 411.25 AU |
| Perihelion | 31.276 AU |
| 221.26 AU | |
| Eccentricity | 0.8586 |
| 3291.32 yr (1,202,155 days) | |
| 1.6973° | |
| 0° 0m 1.08s / day | |
| Inclination | 6.0347° |
| 341.55° | |
| 354.30° | |
| Physical characteristics | |
| Dimensions | 78 km[4] |
| 24.6 | |
| 9.0683[1] | |
It is one a small number of detached objects with perihelion distances of 30 AUs or more, and semi-major axes of 200 AU or more.[5] Such objects can not reach such orbits without some perturbing object, which leads to the speculation of Planet Nine.
