The 3 - 7 metre wide asteroid 2008 BW2 will make a close pass (65.3 lunar distances, 0.1678 AU), travelling at 11.10 km/second, to the Earth-Moon system on the 11th October, 2012 @ 12:18 UT ±1 day 00:34.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).