It's more than 2,000-feet wide and will speed past tonight (Nov. 20) but you probably won't notices.
At 17,800 mph, the giant asteroid is expected to race past earth beginning about 7 p.m.
Scientist say "481394," or 2006 SF6 for short, will come within 2.7 million miles of Earth. That's about 11 times the distance between our planet and the moon.
Researchers have been tracking the rock since it's discovery in 2006, Newsweek reports.