Update: The 50 - 110 metre wide asteroid 2008 BX2 will make a close pass (60.5 lunar distances, 0.1555 AU), travelling at 7.66 km/second, to the Earth-Moon system on the 26th February, 2012 @ 12:00 UT ± 00:01.
The 50 - 110 metre wide asteroid 2008 BX2 will make a close pass (60.7 lunar distances, 0.0739 AU), travelling at 7.66 km/second, to the Earth-Moon system on the 25th February, 2012 @ 21:44 UT ±1 day 03:29.