The 340 - 750 metre wide asteroid 2015 NF will make a close pass (64.6 LD, 0.1660 AU) travelling at 29.47 km/second, to the Earth-Moon system on the 13th July 2015 @ 06:27 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).