The 74 - 160 metre wide asteroid 2014 QT168 will make a close pass (70.0 lunar distances, 0.1799 AU), travelling at 3.74 km/second, to the Earth-Moon system on the 15th September 2014 @ 19:10 UT ±03:49.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).