* Astronomy

The 270 - 590 metre wide asteroid 2006 YF13 will make a close pass (71.1 lunar distances, 0.1827 AU), travelling at 17.89 km/second, to the Earth-Moon system on the 27th November, 2013 @ 00:38 UT ±00:03. 

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).