* Astronomy

The 290 - 650 metre wide asteroid 2005 YU3 made a close pass (46.9 lunar distances, 0.1205 AU), travelling at 31.46 km/second, to the Earth-Moon system on the 27th 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).