The 35 - 78 metre wide asteroid 2014 NG3 will make a close pass (23.1 lunar distances, 0.0594 AU), travelling at 6.52 km/second, to the Earth-Moon system on the 11th July 2014 @ 22:26 UT ±00:06.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).