The 160 - 360 metre wide asteroid 2008 SW11 will make a close pass (73.3 lunar distances, 0.1885 AU), travelling at 8.52 km/second, to the Earth-Moon system on the 25th August 2014 @ 05:48 UT ±00:01.
The 160 - 350 metre wide asteroid 2008 SW11 will make a close pass (73.2 lunar distances, 0.1881 AU), travelling at 17.34 km/second, to the Earth-Moon system on the 3rd February, 2013 @ 14:58 UT ±00:01.
The 180 - 400 metre asteroid 2008 SW11 (H=21.1) was discovered by the spacewatch - Steward Observatory, Kitt Peak-Spacewatch on the 25th September, 2008. The preliminary orbital elements indicate that will make a flyby of the Earth Moon system at 07:11 UT, 1st April, 2009, with a minimum distance of 0.0057613 AU. (Palermo Scale > -2)