* Astronomy

The 280 - 620 metre wide asteroid 2008 SR7 will make a close pass (55.3 lunar distances, 0.1421 AU), travelling at 8.31 km/second, to the Earth-Moon system on the 5th August, 2011 @ 04:34 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).