The 81 - 180 metre wide asteroid 2013 QL10 will make a close pass (69.5 lunar distances, 0.1785 AU), travelling at 8.82 km/second, to the Earth-Moon system on the 16th September, 2013 @ 03:19 UT ±3 days 04:38.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).