* Astronomy

The 64 - 140 metre wide asteroid 2005 YY1 will make a close pass (50.9 lunar distances, 0.1307 AU), travelling at 11.71 km/second, to the Earth-Moon system on the 11th December, 2010 @ 18:15 UT.

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