2004 FU162 is an Aten near-Earth asteroid less than 20 meters in diameter crudely estimated to have passed roughly 6500 km above the surface of Earth[b] on 31 March 2004.
But due to the very short observation arc, the uncertainty in the close approach distance is a large ±15000 km.
Nevertheless, "the orbit is quite determinate and, given the exceptional nature of this close approach, the object is now receiving a designation".
[citation needed] This means that it would burn up from atmospheric friction before striking the ground in the case of an Earth impact.
On 26 March 2010, it may have come within 0.0825 AU (12.3 million km) of Earth,[4] but with an uncertainty parameter of 9,[1] the orbit is poorly determined.