Get your telescopes ready. Asteriod TU24 will pass within 334,000 miles of the Earth (about three times the distance to the Moon) 2008 Jan. 29 08:33 UT (2:33 AM CST). Not sure what magnitude it is, but according to NASA it will be visible with a 3" scope (which should make it better than 11.4).
Where it will appear:
Star Map from NASA