The 580 - 1300 metre wide asteroid 2002 CU11 will make a close pass (13.5 lunar distances, 0.0347 AU), travelling at 26.09 km/second, to the Earth-Moon system on the 30th August 2014 @ 03:14 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).
At magnitude +14.0, moving through the constellations Taurus to Eridani