|Discovered by||Mount Lemmon Survey (G96)|
|Discovery date||September 5, 2010|
|MPC designation||2010 RF12|
|Minor planet category||Apollo NEO|
|Aphelion||1.26 AU (Q)|
|Perihelion||0.8609 AU (q)|
|Semi-major axis||1.060 AU (a)|
|Orbital period||1.09 yr|
|Mean anomaly||76.41° (M)|
|Longitude of ascending node||163.8°|
|Argument of perihelion||267.58°|
|Dimensions||~7 meters (23 ft)
6–14 m (20–46 ft)
|Mass||5×105 kg (assumed)|
|Absolute magnitude (H)||28.1|
NASA's Near Earth Program estimates its size to be 7 metres in diameter with a mass of around 500 tonnes. 2010 RF12 will make many more close approaches, with the approach of September 5−6, 2095 having a 6% chance (1 in 16) of colliding with Earth. The nominal JPL Earth approach in 2095 is 0.000058 AU (8,700 km; 5,400 mi) with Earth having a radius of approximately 6,400 km. Due to the asteroid's relatively small size there is little danger of harm arising from such an impact, rather there would be an impressive fireball as the rock airburst in the upper atmosphere. The power of the airburst would be somewhere between the Sutter's Mill meteorite and the Chelyabinsk meteor. The nominal NEODyS orbit shows that the asteroid will pass 0.0001 AU (15,000 km; 9,300 mi) from Earth on September 6, 2095, with an apparent magnitude of ~12.
- 2010 RX30, a similar-sized asteroid that passed Earth the same day
- 2000 SG344, an Earth threatening S-IVB booster?
- 2006 JY26
- List of asteroid close approaches to Earth, for other close approaches
- "MPEC 2010-R41 : 2010 RF12". IAU Minor Planet Center. 2010-09-05. Retrieved 2014-04-17. (K10R12F)
- "JPL Close-Approach Data: (2010 RF12)". 2010-09-08 last obs (arc=3 days). Retrieved 2013-08-12.
- "Earth Impact Risk Summary: 2010 RF12". NASA/JPL Near-Earth Object Program Office. Retrieved 2014-04-16.
- Harvard scientists keep an eye on wayward asteroids
- "Impactor Table: 2010RF12". NEODyS-2. Retrieved 2014-04-16. (1 in 12)
- How a Near-Earth Object Impact Might Affect Society, 9 January 2003, Clark R. Chapman, SwRI, Boulder CO USA
- "2010RF12 Ephemerides for 5−6 September 2095". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2014-04-17.
- Second Asteroid to Buzz Earth Later Today
|This near-Earth asteroid-related article is a stub. You can help Wikipedia by expanding it.|