The 56 - 120 metre wide asteroid 2013 XZ20 will make a close pass (54.1 lunar distances, 0.1391 AU), travelling at 10.32 km/second, to the Earth-Moon system on the 16th December, 2013 @ 15:26 UT ±00:19.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
