2010 RF12
Small risk–listed near-Earth asteroid / From Wikipedia, the free encyclopedia
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2010 RF12 is a very small asteroid, classified as near-Earth object of the Apollo group, that passed between Earth and the Moon on 8 September 2010, at 21:12 UTC, approaching Earth within 79,000 kilometres (49,000 mi) above Antarctica.[5] The asteroid was discovered by the Mount Lemmon Survey near Tucson, Arizona on 5 September 2010 along with 2010 RX30.[1][6] Based on a short 7-day observation arc from that apparation, it was listed for 12 years on the Sentry Risk Table as the asteroid with the greatest known probability (5%) of impacting Earth.[7][note 1] 2010 RF12 was rediscovered in August 2022,[8][1] and now has a 12 year observation arc and a much better known orbit. As of the December 2022 solution which accounts for nongravitational forces,[3] there is a 1-in-10 chance of an Earth impact on 5 September 2095.[4]
Date | Impact probability |
JPL Horizons nominal geocentric distance (AU) |
uncertainty region (3-sigma) |
---|---|---|---|
2095-09-06 00:06 ± 00:20 | 1:10 | 0.00035 AU (52 thousand km)[3] | ±180 thousand km[9] |
Discovery[1][2] | |
---|---|
Discovered by | Mount Lemmon Srvy. |
Discovery site | Mount Lemmon Obs. |
Discovery date | 5 September 2010 |
Designations | |
2010 RF12 | |
NEO · Apollo[1][3] | |
Orbital characteristics[3] | |
Epoch 2023-Feb-25 (JD 2460000.5) | |
Uncertainty parameter 0 (MPC)[1] 2 (JPL)[3] | |
Observation arc | 11.98 years |
Aphelion | 1.261 AU |
Perihelion | 0.86145 AU |
1.0611 AU | |
Eccentricity | 0.18819 |
1.093 yr (399 d) | |
84.6° | |
0° 54m 9s / day | |
Inclination | 0.88248° |
163.71° | |
2022-Nov-23[3] | |
267.39° | |
Earth MOID | 0.00054 AU (81 thousand km; 0.21 LD) |
Physical characteristics | |
Mean diameter | 7 m[4] 6–12 meters (CNEOS) |
28.4[1][3] | |