The 33 - 75 metre wide asteroid 2014 MY will make a close pass (26.1 lunar distances, 0.0672 AU), travelling at 9.57 km/second, to the Earth-Moon system on the 26th June 2014 @ 11:19 UT ±00:04.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).