* Astronomy

The 160 - 370 metre wide asteroid 1998 OX4 will make a close pass (73.4 lunar distances, 0.1886 AU), travelling at 17.34 km/second, to the Earth-Moon system on the 31st August, 2010 @ 13:37 UT.

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