The 75 - 170 metre wide asteroid 2014 DK112 will make a close pass (48.1 lunar distances, 0.1236 AU), travelling at 18.74 km/second, to the Earth-Moon system on the 23rd March 2014 @ 01:25 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).