Puneet Varma (Editor)

(392741) 2012 SQ31

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Discovery date
  
27 December 2009

Alternative names
  
2004 PR107, 2009 YS20

Observation arc
  
4631 days (12.68 yr)

Absolute magnitude
  
18

Asteroid group
  
Asteroid belt

MPC designation
  
(392741) 2012 SQ31

Minor planet category
  
Main belt

Discovered
  
27 December 2009

Orbits
  
Sun

(392741) 2012 SQ31, also known as 2004 PR107, 2009 YS20 and 2012 SQ31 is an asteroid in the asteroid belt with an absolute magnitude (H) of 17.8. It was discovered on August 11, 2004 by Cerro Tololo Inter-American Observatory, and then lost due to a lack of follow-up observations.

With an observation arc of only 1 day (consisting of only two images), 2004 PR107 was thought to be a trans-Neptunian object with a semi-major axis (a) of 46 AU. Mike Brown's website listed it as a likely a dwarf planet with an estimated diameter of 555 km. It was rediscovered in 2009 as 2009 YS20, but was not identified at the time as being related to 2004 PR107. The lost asteroid was rediscovered as 2012 SQ31 and determined to be a small, ~1-kilometer asteroid in the asteroid belt. Precovery images from December 5, 2002 have been located.

References

(392741) 2012 SQ31 Wikipedia


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