Astronomy:2021 DR15

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2021 DR15
Discovery[1]
Discovered byS. S. Sheppard
D. J. Tholen
C. Trujillo
Discovery siteMauna Kea Obs.
Discovery date17 February 2021
Designations
2021 DR15
Minor planet categoryTNO[2] · SDO[3]
p-DP · distant[4]
Orbital characteristics[4]
Epoch 21 January 2022 (JD 2459600.5)
Uncertainty parameter 5
Observation arc16.74 yr (6,115 days)
Earliest precovery date10 March 2005
|{{{apsis}}}|helion}}96.518 AU
|{{{apsis}}}|helion}}37.824 AU
67.171 AU
Eccentricity0.4369
Orbital period551 yr
Mean anomaly334.122°
Mean motion0° 0m 6.445s / day
Inclination30.691
Longitude of ascending node334.122
21.846
Physical characteristics
Mean diameter600–800 km (est. 0.1–0.2)[5]
Apparent magnitude23.2[1]
Absolute magnitude (H)3.61±0.15[2] · 3.61[4]


2021 DR15 is a large trans-Neptunian object in the scattered disc, around 700 kilometres (430 miles) in diameter. It was discovered on 17 February 2021, by American astronomers Scott Sheppard, David Tholen, and Chad Trujillo using the 8.2-meter Subaru Telescope of the Mauna Kea Observatories in Hawaii, and announced on 17 December 2021.[1] It was 89.4 astronomical units from the Sun when it was discovered, making it the ninth-most distant known Solar System object from the Sun (As of December 2021).[1] It has been identified in several precovery images as far back as 10 March 2005.[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 "MPEC 2021-Y28 : 2021 DR15". Minor Planet Electronic Circular. Minor Planet Center. 17 December 2021. https://minorplanetcenter.net/mpec/K21/K21Y28.html. Retrieved 17 December 2021. 
  2. ↑ 2.0 2.1 2.2 "JPL Small-Body Database Browser: (2021 DR15)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=54231255. Retrieved 17 December 2021. 
  3. ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. International Astronomical Union. https://www.minorplanetcenter.net/iau/lists/t_centaurs.html. Retrieved 17 December 2021. 
  4. ↑ 4.0 4.1 4.2 "2021 DR15". Minor Planet Center. International Astronomical Union. https://www.minorplanetcenter.net/db_search/show_object?object_id=2021+DR15. Retrieved 17 December 2021. 
  5. ↑ "Asteroid Size Estimator". Center for Near Earth Object Studies. Jet Propulsion Laboratory. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 17 December 2021. 

External links




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