The 450 - 1000 metre wide asteroid 2008 CR118 will make a close pass (64.1 lunar distances, 0.1647 AU), travelling at 16.08 km/second, to the Earth-Moon system on the 2nd September, 2013 @ 13:33 UT ±00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).