| Discovery[1] | |
|---|---|
| Discovered by | S. S. Sheppard C. Trujillo |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 12 June 2021 |
| Designations | |
| 2021 LL37 | |
| TNO[2] · SDO[3] · distant[4] | |
| Orbital characteristics[4] | |
| Epoch 21 January 2022 (JD 2459600.5) | |
| Uncertainty parameter6 | |
| Observation arc | 7.95 yr (2,902 days) |
| Earliest precovery date | 28 April 2014 |
| Aphelion | 75.752 AU |
| Perihelion | 35.884 AU |
| 55.818 AU | |
| Eccentricity | 0.3571 |
| 417 yr | |
| 213.123° | |
| 0° 0m 8.508s / day | |
| Inclination | 9.950 |
| 345.422 | |
| 48.715 | |
| Physical characteristics | |
Mean diameter | 500–700 km (est. 0.1–0.2)[5] |
| 22.7[1] | |
| 3.96±0.31[2] · 4.09[4] | |
2021 LL37 is a large trans-Neptunian object in the scattered disc, around 600 kilometres (370 miles) in diameter. It was discovered on 12 June 2021, by American astronomers Scott Sheppard and Chad Trujillo using Cerro Tololo Inter-American Observatory's Dark Energy Camera in Chile, and announced on 31 May 2022.[1] It was 73.9 astronomical units from the Sun when it was discovered, making it one of the most distant known Solar System objects from the Sun as of May 2022[update].[1][6] It has been identified in precovery images from as far back as 28 April 2014.[4]
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