The huge asteroid 2005 YU55 will sweep closely past the Earth – missing us by 319,000 kilometers (about 200,000 miles) – tomorrow. It’ll be the closest known passage of an asteroid this big – but there was an even closer passage to Earth of this same asteroid in 1976, which went undetected. This time, astronomers spotted it ahead of time.
On this November 8, 2011 passage, 2005 YU55 will come closer than the moon’s distance from Earth, but it will not strike Earth or the moon.
The time of closest passage will be November 8 at 5:28 p.m. CST (23:28 UTC).