* Astronomy

The 73 - 160 metre wide asteroid 2008 SD85 will make a close pass (74.3 lunar distances, 0.1908 AU), travelling at 13.44 km/second, to the Earth-Moon system on the 23rd September, 2013 @ 18:02 UT ±05:38. 

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