The 39 - 86 metre wide asteroid 2014 MG55 will make a close pass (26.3 lunar distances, 0.0675 AU), travelling at 7.87 km/second, to the Earth-Moon system on the 25th July 2014 @ 12:28 UT ±00:03.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).