The 790 - 1800 metre wide asteroid 2000 FM10 will make a close pass (50.3 lunar distances, 0.1293 AU), travelling at 21.41 km/second, to the Earth-Moon system on the 5th June, 2013 @ 01:31 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).