2021 LL37
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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 parameter 6 | |
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]
References
- ^ a b c d "MPEC 2022-K173 : 2021 LL37". Minor Planet Electronic Circular. Minor Planet Center. 31 May 2022. Retrieved 31 May 2022.
- ^ a b "JPL Small-Body Database Browser: (2021 LL37)" (2022-04-08 last obs.). Jet Propulsion Laboratory. Retrieved 31 May 2022.
- ^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. International Astronomical Union. Retrieved 31 May 2022.
- ^ a b c d "2021 LL37". Minor Planet Center. International Astronomical Union. Retrieved 31 May 2022.
- ^ "Asteroid Size Estimator". Center for Near Earth Object Studies. Jet Propulsion Laboratory. Retrieved 31 May 2022.
- ^ "JPL Horizons On-Line Ephemeris for 2021 LL37". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 31 May 2022. Ephemeris Type: VECTORS, Target Body: Asteroid (2021 LL37), Coordinate Origin: Sun (body center) [500@10], Time Span: Start=2021-06-12, Table Settings: quantities code=2p
External links
- 2021 LL37 at AstDyS-2, Asteroids—Dynamic Site
- 2021 LL37 at the JPL Small-Body Database
Categories:
- Use dmy dates from May 2022
- Articles containing potentially dated statements from May 2022
- All articles containing potentially dated statements
- JPL Small-Body Database ID same as Wikidata
- Articles with JPL SBDB identifiers
- Articles with MPC identifiers
- Scattered disc and detached objects
- Minor planet object articles (unnumbered)
- Discoveries by Chad Trujillo
- Discoveries by Scott S. Sheppard
- Possible dwarf planets
- Astronomical objects discovered in 2021
- All stub articles
- Centaur and trans-Neptunian object stubs