The 36 - 81 metre wide asteroid 2014 KA46 will make a close pass (26.1 lunar distances, 0.0670 AU), travelling at 8.51 km/second, to the Earth-Moon system on the 12th June 2014 @ 03:25 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).