Update: The 300 metre wide asteroid 1982 HR will make a close pass (40.1 lunar distances, 0.1032 AU), travelling at 6.06 km/second, to the Earth-Moon system on the 7th December, 2013 @ 00:11 UT ±00:01.
The 300 metre wide asteroid (3361) Orpheus will make a close pass (53.8 lunar distances, 0.1383 AU), travelling at 6.51 km/second, to the Earth-Moon system on the 25th December, 2009.