The 10 - 22 metre wide asteroid 2018 JZ will make a close pass (4.3 lunar distances, 0.01111 AU), travelling at 13.25 km/second, to the Earth on the 11th May 2018 @ 09:05 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).