* Astronomy

The 500 - 1100 metre wide asteroid 2001 HC will make a close pass (65.9-lunar distances, 0.1693-AU), travelling at 14.86-km/second, to the Earth-Moon system on the 15th 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).