The 74 - 170 metre wide asteroid 2014 GC45 will make a close pass (72.1 lunar distances, 0.1853 AU), travelling at 6.21 km/second, to the Earth-Moon system on the 8th May 2014 @ 20:34 UT ±00:07.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).