The 13 - 28 metre wide asteroid 2006 EC will make a close pass (36.3 lunar distances, 0.0932 AU), travelling at 6.13 km/second, to the Earth-Moon system on the 6th August, 2012 @ 03:59 UT ±00:32.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).