The 35 - 78 metre wide asteroid 2012 QL14 will make a close pass (52.6 lunar distances, 0.1352 AU), travelling at 18.13 km/second, to the Earth-Moon system on the 8th August 2014 @ 21:07 UT ±00:14.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).