2002 MN

2002 MN is the provisional designation given to a 73-meter Apollo near-Earth asteroid that on 14 June 2002 passed Earth at a distance of 0.0008 AU, about one third the distance to the Moon (0.3 LD). The close approach was second only to the Earth approach by the 10-meter asteroid 1994 XM1. 2002 MN was discovered on 17 June 2002, three days after closest approach. Its mass and relative velocity were in the same general range as the object ascribed to the Tunguska event of 1908, which leveled over 800 mi2 of trees in Siberia. 2002 MN has an observation arc of 53 days with an uncertainty parameter of 6. There is a cumulative 1 in 360,000 chance that the asteroid could impact Earth sometime after 2070.