The 84 - 190 metre wide asteroid 2015 KJ19 will make a close pass (23.8 lunar distances, 0.06137 AU), travelling at 24.04 km/second, to the Earth on the 16th May 2018 @ 08:37 UT ±21:18.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).