* Astronomy

The 130 - 300 metre wide asteroid 2003 YL118 will make a close pass (13.2 lunar distances, 0.0338 AU), travelling at 16.57 km/second, to the Earth-Moon system on the 22nd 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).