The 330 - 750 metre wide asteroid 2006 HU30 will make a close pass (62.6 lunar distances, 0.1608 AU), travelling at 14.85 km/second, to the Earth-Moon system on the 24th October, 2013 @ 18:51 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).