The 10 - 22 metre wide asteroid 2014 QO295 will make a close pass (4.7 lunar distances, 0.0122 AU), travelling at 10.03 km/second, to the Earth-Moon system on the 31st August 2014 @ 15:47 UT ±00:02.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).