The 240 - 530 metre wide asteroid 2004 UB will make a close pass (77.6 lunar distances, 0.1995 AU), travelling at 14.65 km/second, to the Earth-Moon system on the 8th October, 2012 @ 23:13 UT ±1 day 15:10.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
