The 280 - 630 metre wide asteroid 2002 CQ11 will make a close pass (39.8 lunar distances, 0.1022 AU), travelling at 16.26 km/second, to the Earth-Moon system on the 12th May, 2012 @ 09:24 UT ± 00:01.
The 280 - 630 metre wide asteroid 2002 CQ11 will make a close pass (34.7 lunar distances, 0.0891 AU), travelling at 10.75 km/second, to the Earth-Moon system on the 18th May, 2011 @ 01:33 UT ±00:01.