The 47 - 110 metre wide asteroid 2014 QV169 will make a close pass (73.2 lunar distances, 0.1882 AU), travelling at 5.89 km/second, to the Earth-Moon system on the 18th September 2014 @ 20:56 UT ±00:36.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).