The 3500 metre wide asteroid 2002 CE26 will make a close pass (47.9 lunar distances, 0.1230 AU), travelling at 26.45 km/second, to the Earth-Moon system on the 9th September 2014 @ 04:26 UT ±00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).