2020 MK53
| DiscoveryMPS 1836391 | |
|---|---|
| Discovered by | New Horizons KBO Search-Subaru |
| Discovery site | Subaru |
| Discovery date | 22 June 2020 |
| Designations | |
| 2020 MK53 | |
| TNO[1]·SDO·distant[2] | |
| Orbital characteristics[2] | |
| Epoch24 June 2020 (JD2459024.5) | |
| Uncertainty parameter9 | |
| Observation arc | 3 days[3] |
| Aphelion | 160AU |
| Perihelion | 63 AU |
| 111 AU | |
| Eccentricity | 0.44 |
| 1174 yr | |
| 182° | |
| 0° 0m2.88s/ day | |
| Inclination | 18° |
| 116° | |
| 351° | |
| Physical characteristics | |
| 600–500 km(est. 0.1–0.2)[4] | |
| 25.6 | |
| 4.12[2] | |
2020 MK53is atrans-Neptunian objectin thescattered disc,around 550 kilometres (340 miles) in diameter. It was discovered on 22 June 2020 by the New Horizons KBO Search-Subaru survey[5][6]using the 8.2-meterSubaru Telescopeof theMauna Kea Observatoriesin Hawaii, and announced on 7 April 2023 (MPS 1836391, MPO 735634). It was 160astronomical unitsfrom the Sun when it was discovered, making it thefarthest known Solar System object from the Sunas of September 2023[update],well ahead of2018 VG18(124 AU) and2018 AG37(~132 AU).[2][7]Given its very short data-arc the only reliable information is in its range (156±4 AU) and range-rate (−0.04 km/s), which suggests that it is close to its aphelion.[8]
References
[edit]- ^"JPL Small-Body Database Browser: (2020 MK53)"(2020-06-25 last obs.).Jet Propulsion Laboratory.Retrieved9 September2023.
- ^abcd"2020 MK53".Minor Planet Center.International Astronomical Union.Retrieved9 September2023.
- ^"Distant objects".Minor Planet Center.International Astronomical Union.Retrieved10 September2023.
- ^"Asteroid Size Estimator".Center for Near Earth Object Studies.Jet Propulsion Laboratory.Retrieved31 May2022.
- ^"Subaru Telescope and New Horizons Explore the Outer Solar System".Subaru Telescope.Retrieved10 September2023.
- ^"New Horizons Team Adds AI Smarts to Its Kuiper Belt Object Search".NASA/Johns Hopkins APL/Southwest Research Institute/Subaru Telescope.National Aeronautics and Space Administration. 6 March 2023.Retrieved10 September2023.
- ^"JPL Horizons On-Line Ephemeris for 2020 MK53".JPL Horizons On-Line Ephemeris System.Jet Propulsion Laboratory.Retrieved9 September2023.Ephemeris Type: VECTORS, Target Body: Asteroid (2020 MK53)
- ^C. de la Fuente Marcos & R. de la Fuente Marcos (1 January 2024)."Past the outer rim, into the unknown: structures beyond the Kuiper Cliff".Monthly Notices of the Royal Astronomical Society Letters.527(1): L110–L114.arXiv:2309.03885.Bibcode:2024MNRAS.527L.110D.doi:10.1093/mnrasl/slad132.Retrieved28 September2023.
External links
[edit]- 2020 MK53atAstDyS-2, Asteroids—Dynamic Site
- 2020 MK53at theJPL Small-Body Database
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