* Astronomy

The 190 - 420 metre wide asteroid 2004 US1 will make a close pass (26.2 lunar distances, 0.0673 AU), travelling at 18.07 km/second, to the Earth-Moon system on the 25th April, 2010.

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