* Astronomy

The 350 - 780 metre wide asteroid 2008 OS9 will make a close pass (73.6 lunar distances, 0.1890 AU), travelling at 16.98 km/second, to the Earth-Moon system on the 23rd August, 2010 @ 13:46 UT.

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