The 4 - 8 metre wide asteroid 2007 EK will make a close pass (58.4 lunar distances, 0.1501 AU), travelling at 12.84 km/second, to the Earth-Moon system on the 4th March, 2013 @ 12:03 UT ±04:57.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).