The 760 - 1700 metre wide asteroid (54660) 2000 UJ1 will make a close pass (43.3 Lunar Distances, 0.1113 AU), travelling at 25.25 km/s, to the Earth-Moon system on the 7th November, 2009. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).