The 160 - 350 metre wide asteroid 2008 HB38 will make a close pass (12.7 lunar distances, 0.0326 AU), travelling at 10.42 km/second, to the Earth-Moon system on the 15th September, 2013 @ 23:52 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).
