145451 Rumina
Rumina imaged by the Hubble Space Telescope on 2 November 2008 | |
| Discovery | |
|---|---|
| Discovered by | A. C. Becker A. W. Puckett J. M. Kubica |
| Discovery site | Apache Point Obs. |
| Discovery date | 9 September 2005 |
| Designations | |
| (145451) Rumina | |
| Pronunciation | /ruːˈmaɪnə/ |
Named after | Rumīna |
| 2005 RM43 | |
| SDO | |
| Orbital characteristics | |
| Epoch 2025 May 05 (JD 2460800.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 48.18 yr (17,596 d) |
| Earliest precovery date | 17 November 1976 |
| Aphelion | 149.67 AU (22.390 Tm) |
| Perihelion | 35.147 AU (5.2579 Tm) |
| 92.41 AU (13.824 Tm) | |
| Eccentricity | 0.6197 |
| 888.36 yr (324475±19 d) | |
| 8.226° | |
| 0° 0m 3.994s / day | |
| Inclination | 28.6976° |
| 84.629° | |
| 318.672° | |
| Known satellites | 0 |
| Physical characteristics | |
| ≈644 km (derived from occultation; 455 and 460 km measured) 524+96 −103 km | |
Mean density | >0.56 g/cm3 |
| 6.71 h (0.280 d) | |
| 0.102 | |
| V–R=0.33±0.02 (neutral) B0−V0=0.590 B-R=0.99 | |
| 20.4 | |
| 4.52±0.01 4.4 · 4.8 | |
145451 Rumina (provisional designation 2005 RM43) is a large trans-Neptunian object in the scattered disc region beyond the Kuiper belt. It was discovered on 9 September 2005, by American astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico. It measures approximately 600 kilometers in diameter.