The 270 - 590 metre wide asteroid 2006 KM103 will make a close pass (19.6 lunar distances, 0.0503 AU), travelling at 9.40 km/second, to the Earth-Moon system on the 2nd September 2014 @ 08:57 UT ±00:01.
The 270 - 600 metre wide asteroid 2006 KM103 will make a close pass (24.4 lunar distances, 0.0626 AU), travelling at 8.54 km/second, to the Earth-Moon system on the 25th September, 2012 @ 03:57 UT ±00:01.