The 21 - 47 metre wide asteroid 2014 FD will make a close pass (4.5 lunar distances, 0.0116 AU), travelling at 8.45 km/second, to the Earth-Moon system on the 25th March, 2014 @ 04:33 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).