Update The 770 - 1700 metre wide asteroid 1999 HE1 will make a close pass (29.9 lunar distances, 0.0768 AU), travelling at 11.41 km/second, to the Earth-Moon system on the 5th June, 2010 @ 09:49 UT.
The 740 - 1600 metre wide asteroid 1999 HE1 will make a close pass (29.9 lunar distances, 0.0768 AU), travelling at 11.41 km/second, to the Earth-Moon system on the 5th June, 2010.