NASA's Near Earth Program estimates its size to be 7 metres (23 ft) in diameter with a mass of around 500 tonnes.2010 RF12 will make many more close approaches to the Earth, with the approach of September 5−6, 2095 having a 6% chance (1 in 16) of colliding with Earth. The nominalJPL Earth approach in 2095 is 0.000058 AU (8,700 km; 5,400 mi) with Earth having a radius of approximately 6,400 kilometres (4,000 mi). 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 air burst 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.