The 840 - 1900 metre wide asteroid 2004 BV102 will make a close pass (69.9 lunar distances, 0.1795 AU), travelling at 26.53 km/second, to the Earth-Moon system on the 25th May, 2013 @ 18:28 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).