* Astronomy

The 35 - 78 metre wide asteroid 2013 QM10 will make a close pass (29.0 lunar distances, 0.0745 AU), travelling at 3.24 km/second, to the Earth-Moon system on the 25th September, 2013 @ 15:51 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).