The 4 - 9 metre wide asteroid 2006 BV39 will make a close pass (44.1 lunar distances, 0.1132 AU), travelling at 11.11 km/second, to the Earth-Moon system on the 12th July, 2012 @ 02:49 UT ±05:52.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).