The 250 - 550 metre wide asteroid 2005 DD will make a close pass (38.8 lunar distances, 0.0996 AU), travelling at 13.34 km/second, to the Earth-Moon system on the 7th January, 2013 @ 12:41 UT ±2 days 20:48.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).