(392741) 2012 SQ31

(392741) 2012 SQ31
Discovery[1]
Discovered by Cerro Tololo Inter-American Observatory (807)
Discovery date 27 December 2009
Designations
MPC designation (392741) 2012 SQ31
2004 PR107, 2009 YS20[2]
Main belt
Orbital characteristics[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 4631 days (12.68 yr)
Aphelion 2.5807 AU (386.07 Gm)
Perihelion 1.9395 AU (290.15 Gm)
2.2601 AU (338.11 Gm)
Eccentricity 0.14186
3.40 yr (1241.1 d)
336.50°
 17m 24.252s / day
Inclination 3.8541°
78.021°
316.81°
Earth MOID 0.946981 AU (141.6663 Gm)
Jupiter MOID 2.83122 AU (423.544 Gm)
Jupiter Tisserand parameter 3.604
Physical characteristics
Dimensions ~1 km
18.0[3]

    (392741) 2012 SQ31, also known 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 two 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

    1. 1 2 3 "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. 1 2 3 4 (392741) = 2004 PR107 = 2009 YS20 = 2012 SQ31
    3. 1 2 3 4 "JPL Small-Body Database Browser: (2012 SQ31 = 2004 PR107)" (last observation: 2014-04-04; arc: 11.33 years). Jet Propulsion Laboratory. Retrieved 8 April 2016.
    4. "How many dwarf planets are there in the outer solar system?". Wayback Machine: California Institute of Technology. 2011-10-18. Archived from the original on October 18, 2011. Retrieved 2014-04-02.

    External links


    This article is issued from Wikipedia - version of the Saturday, April 09, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.