The 200 - 450 metre wide asteroid 2013 UY will make a close pass (62.4 lunar distances, 0.1604 AU), travelling at 15.08 km/second, to the Earth-Moon system on the 2nd November, 2013 @ 14:51 UT ±00:02.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).