* Astronomy

The 56 - 130 metre wide asteroid 2013 RY5 will make a close pass (37.6 lunar distances, 0.0966 AU), travelling at 6.84 km/second, to the Earth-Moon system on the 26th September, 2013 @ 04:45 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).