The 53 - 120 metre wide asteroid 2005 XY4 will make a close pass (41.7 lunar distances, 0.1071 AU), travelling at 22.75 km/second, to the Earth-Moon system on the 20th March, 2013 @ 20:17 UT ±21:20.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
