* Astronomy

The 62 - 140 metre wide asteroid 2013 YL2 will make a close pass (3.6 lunar distances, 0.0093 AU), travelling at 21.99 km/second, to the Earth-Moon system on the 3rd January 2014 @ 00:46 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).