The 490 - 1100 metre wide asteroid 2000 JB6 will make a close pass (69.3 lunar distances, 0.1780 AU), travelling at 6.42 km/second, to the Earth-Moon system on the 10th July, 2012 @ 05:10 UT ±00:01.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).