The 23 - 51 metre wide asteroid 2015 LK will make a close pass (7.8 LD, 0.0201 AU) travelling at 8.14 km/second, to the Earth-Moon system on the 17th June 2015 @ 23:30 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).