* Astronomy

The 120 - 260 metre wide asteroid 2013 VG13 will make a close pass (53.0 lunar distances, 0.1362 AU), travelling at 9.55 km/second, to the Earth-Moon system on the 18th December, 2013 @ 12:00 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).