The 370 - 840 metre wide asteroid 2006 FJ9 will make a close pass (77.5 lunar distances, 0.1992 AU), travelling at 4.63 km/second, to the Earth-Moon system on the 24th June, 2013 @ 22:40 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).