* Astronomy

The 420 - 940 metre wide asteroid 2001 LL5 will make a close pass (61.1 lunar distances, 0.1571 AU), travelling at 8.75 km/second, to the Earth-Moon system on the 24th December, 2012 @ 05:05 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).