(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° | |
| 0° 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 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)
- 1 2 3 4 (392741) = 2004 PR107 = 2009 YS20 = 2012 SQ31
- 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.
- ↑ "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.