* Astronomy

The 400 - 890 metre wide asteroid 2001 AD2 made a close pass (40.2 lunar distances, 0.1033 AU), travelling at 24.82 km/second, to the Earth-Moon system on the 31st March, 2011 @ 06:11 UT ±00:01.

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