(523794) 2015 RR245
2015 RR245 imaged by the Hubble Space Telescope in October 2020 | |
| Discovery | |
|---|---|
| Discovered by | OSSOS Michele T. Bannister et al. |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 9 September 2015 |
| Designations | |
| (523794) 2015 RR245 | |
| TNO · SDO · resonant (2:9) p-DP · distant | |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 13.10 yr (4,786 d) |
| Earliest precovery date | 15 October 2004 |
| Aphelion | 128.80 AU |
| Perihelion | 33.943 AU |
| 81.373 AU | |
| Eccentricity | 0.5829 |
| 734.05 yr (268,113 d) | |
| 323.86° | |
| 0° 0m 4.68s / day | |
| Inclination | 7.5755° |
| 211.68° | |
| ≈ 21 August 2092 ±3 days | |
| 261.02° | |
| Known satellites | 0 |
| Physical characteristics | |
| ≈525 km ≈630 km 670 kilometres (420 mi), assuming an albedo of 0.12; 500–870 km for an albedo of 0.21 to 0.07 | |
| 0.12 (assumed) 0.11 (assumed) 0.135 (assumed) | |
| neutral g–r=0.59±0.11 | |
| 21.2 (perihelic) | |
| 3.6±0.1 (Hr) 3.81 | |
(523794) 2015 RR245 is a large trans-Neptunian object of the Kuiper belt in the outermost regions of the Solar System. It was discovered on 9 September 2015, by the Outer Solar System Origins Survey at Mauna Kea Observatories on the Big island of Hawaii, in the United States. The object is in a rare 2:9 resonance with Neptune and probably measures somewhere between 500 and 900 kilometres in diameter.