The 36 - 81 metre wide asteroid 2014 JH15 will make a close pass (8.0 lunar distances, 0.0206 AU), travelling at 13.20 km/second, to the Earth-Moon system on the 17th May 2014 @ 12:58 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).