* Astronomy

The 380 - 850 metre wide asteroid 2006 UR will make a close pass (57.7 lunar distances, 0.1484 AU), travelling at 5.15 km/second, to the Earth-Moon system on the 29th December, 2009.

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