| Discovery[1] | |
|---|---|
| Discovered by | D. C. Jewitt C. Trujillo J. X. Luu J. Chen |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 8 October 1996 |
| Designations | |
| (20161) 1996 TR66 | |
| TNO[1] · twotino[2][3] distant[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 12.04 yr (4,398 days) |
| Aphelion | 66.612 AU |
| Perihelion | 28.630 AU |
| 47.621 AU | |
| Eccentricity | 0.3988 |
| 328.63 yr (120,032 d) | |
| 55.593° | |
| 0° 0m 10.8s / day | |
| Inclination | 12.436° |
| 343.11° | |
| 308.70° | |
| Physical characteristics | |
| Dimensions | 139 km[5] |
| 7.5[1] | |
(20161) 1996 TR66 is a trans-Neptunian object orbiting beyond Pluto in the Kuiper belt of the outermost Solar System, approximately 139 kilometers (86 miles) in diameter. It was discovered on 8 October 1996, by astronomers David Jewitt, Chad Trujillo, Jane Luu, and Jun Chen at the Mauna Kea Observatory, Hawaii, in the United States.[4] It was the first discovery of a twotino.
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