The 110 - 240 metre wide asteroid 2014 HM2 will make a close pass (39.9 lunar distances, 0.1024 AU), travelling at 6.64 km/second, to the Earth-Moon system on the 27th May 2014 @ 10:08 UT ±00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).