The 140 - 310 metre wide asteroid 1999 UR will make a close pass (76.5 lunar distances, 0.1965 AU), travelling at 14.53 km/second, to the Earth-Moon system on the 20th January, 2013 @ 11:54 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).
