541132 Leleākūhonua
| Discovery | |
|---|---|
| Discovered by | D. J. Tholen C. Trujillo S. S. Sheppard |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 13 October 2015 |
| Designations | |
| (541132) Leleākūhonua | |
| Pronunciation | English: /ˌlɛleɪɑːˌkuːhoʊˈnuːə/ Hawaiian: [lelejaːkuːhoˈnuwə] |
| |
| TNO · sednoid | |
| Orbital characteristics (barycentric) | |
| Epoch 25 February 2023 (JD 2460000.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 13.04 yr (4,763 d) |
| Earliest precovery date | 5 October 2005 |
| Aphelion | 2114 AU |
| Perihelion | 64.95 AU |
| 1090 AU | |
| Eccentricity | 0.94039 |
| 35950 yr | |
| 359.445° | |
| 0° 0m 0.099s / day | |
| Inclination | 11.671° |
| 300.995° | |
| ≈ 11 June 2078 ±4.5 months | |
| 117.974° | |
| Physical characteristics | |
| 110+14 −10 km | |
| 0.21+0.03 −0.05 | |
| 24.5 | |
| 5.57±0.13 | |
541132 Leleākūhonua (/ˌlɛleɪɑːˌkuːhoʊˈnuːə/) (provisional designation 2015 TG387) is an extreme trans-Neptunian object and sednoid in the outermost part of the Solar System. It was first observed on 13 October 2015, by astronomers at the Mauna Kea Observatories, Hawaii. Based on its discovery date near Halloween and the letters in its provisional designation 2015 TG387, the object was informally nicknamed "The Goblin" by its discoverers and later named Leleākūhonua, comparing its orbit to the flight of the Pacific golden plover. It was the third sednoid discovered, after Sedna and 2012 VP113, and measures around 220 kilometers (140 miles) in diameter.