The 23 - 52 metre wide asteroid 2014 EN12 will make a close pass (25.6 lunar distances, 0.0658 AU), travelling at 12.31 km/second, to the Earth-Moon system on the 15th March, 2014 @ 07:44 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).