* Astronomy

The 240 - 530 metre wide asteroid 2001 BP61 will make a close pass (75.9 lunar distances, 0.1951 AU), travelling at 11.83 km/second, to the Earth-Moon system on the 19th 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).