The 13 - 30 metre wide asteroid 2014 UW57 will make a close pass (12.1 lunar distances, 0.0310 AU) travelling at 3.99 km/second, to the Earth-Moon system on the 16th November 2014 @ 16:35 UT ±00:32.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).