The 20 - 45 metre wide asteroid 2004 YC will make a close pass (41.0 lunar distances, 0.1054 AU), travelling at 9.35 km/second, to the Earth-Moon system on the 20th March 2014 @ 12:08 UT ±00:28.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
