* Astronomy

The 25 - 57 metre wide asteroid 2010 SG15 will make a close pass (34.9 lunar distances, 0.0898 AU), travelling at 4.92 km/second, to the Earth-Moon system on the 13th October 2013 @ 17:59 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).