2020 MK53

2020 MK53
Discovery[1]
Discovered byNew Horizons KBO Search-Subaru
Discovery siteMauna Kea Obs.
Discovery date22 June 2020
Designations
2020 MK53
TNO[2] · distant[1]
Orbital characteristics[2]
Epoch 24 June 2020 (JD 2459024.5)
Uncertainty parameter 9
Observation arc3 days
Aphelion160±30235 AU
Perihelion63±58812 AU
111±21051 AU
Eccentricity0.44±457
1174±33309 yr
182°±3376000°
0° 0m 3.024s / day
Inclination182°±3376000°
116°±2975°
351°±1470600°
Physical characteristics
600–500 km (est. 0.1–0.2)[3]
26.3[4]
4.12±0.35[2][1]

2020 MK53 is a lost trans-Neptunian object discovered on 22 June 2020 and announced on 7 April 2023 (MPS 1836391, MPO 735634) by the New Horizons KBO Search team[5] using the 8.2-meter Subaru Telescope at Mauna Kea Observatory in Hawaii.[1] The orbit of 2020 MK53 is highly uncertain because it was observed for only 3 days, which is not long enough to determine an orbit accurately.[6][1] Its distance from the Sun might be around 160 astronomical units according to orbital calculations, which would make 2020 MK53 the farthest known Solar System object from the Sun.[7] However, the uncertainty in 2020 MK53's distance from the Sun ranges from ±4 AU to over ±20,000 AU, depending on the method of calculation.[6] Given its very short observation arc, the only reliably known property of 2020 MK53 is its extremely faint apparent magnitude of 26.3.[4]

References

  1. ^ a b c d e "2020 MK53". Minor Planet Center. International Astronomical Union. Retrieved 9 September 2023.
  2. ^ a b c "JPL Small-Body Database Browser: (2020 MK53)" (2020-06-25 last obs.). Jet Propulsion Laboratory. Retrieved 9 September 2023.
  3. ^ "Asteroid Size Estimator". Center for Near Earth Object Studies. Jet Propulsion Laboratory. Retrieved 31 May 2022.
  4. ^ a b "Distant objects". Minor Planet Center. International Astronomical Union. Retrieved 10 September 2023.
  5. ^ "Subaru Telescope and New Horizons Explore the Outer Solar System". Subaru Telescope. Retrieved 10 September 2023.
  6. ^ a b 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. Retrieved 28 September 2023.
  7. ^ "JPL Horizons On-Line Ephemeris for 2020 MK53". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 9 September 2023. Ephemeris Type: VECTORS, Target Body: Asteroid (2020 MK53)
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