* Astronomy

The 48 - 110 metre wide asteroid 2014 BB3 will make a close pass (45.2 lunar distances, 0.1160 AU), travelling at 3.87 km/second, to the Earth-Moon system on the 21st February 2014 @ 13:06 UT ±00:17. 

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