* Astronomy

The 14 - 32 metre wide asteroid 2003 QB30 will make a close pass (73.9 lunar distances, 0.1899 AU), travelling at 17.69 km/second, to the Earth-Moon system on the 28th February, 2012 @ 09:02 UT ±00:16. 

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