(392741) 2012 SQ31

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(392741) 2012 SQ31
Discovery[1]
Discovered by Cerro Tololo Inter-American Observatory (807)
Discovery date August 11, 2004
Designations
MPC designation (392741) 2012 SQ31
2004 PR107, 2009 YS20[2]
Main belt
Orbital characteristics[3]
Epoch 2014-Dec-09
Aphelion 2.5808 AU
Perihelion 1.9390 AU
2.2599 AU
Eccentricity 0.1420
3.40 yr (1241 d)
220.42°
Inclination 3.8545°
78.025°
316.87°
Physical characteristics
Dimensions ~1 km
17.8[3]

(392741) 2012 SQ31, also written as 2004 PR107, 2009 YS20 and 2012 SQ31[2] is an asteroid in the asteroid belt with an absolute magnitude (H) of 17.8.[3] It was discovered on August 11, 2004 by Cerro Tololo Inter-American Observatory,[1] and then lost due to a lack of follow-up observations.

With an observation arc of only 1 day (consisting of only 2 images), 2004 PR107 was thought to be a trans-Neptunian object with a semi-major axis (a) of 46 AU.[1] Mike Brown's website listed it as a likely a dwarf planet with an estimated diameter of 555 km.[4] It was rediscovered in 2009 as 2009 YS20,[2] 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.[3] Precovery images from December 5, 2002 have been located.[2]

References[edit]

  1. ^ a b c "MPEC 2004-R15 : 2003 QF113, 2004 OJ14, 2004 PR107, 2004 PS107, 2004 PT107". IAU Minor Planet Center. 2004-09-04. Retrieved 2014-04-02.  (K04PA7R)
  2. ^ a b c d (392741) = 2004 PR107 = 2009 YS20 = 2012 SQ31
  3. ^ a b c d "JPL Small-Body Database Browser: (2012 SQ31 = 2004 PR107)" (last observation: 2014-04-04; arc: 11.33 years). Jet Propulsion Laboratory. Retrieved 2014-04-02. 
  4. ^ "How many dwarf planets are there in the outer solar system?". Wayback Machine: California Institute of Technology. 2011-10-18. Retrieved 2014-04-02.