The 48 - 110 metre wide asteroid 2018 JZ1 will make a close pass (24.0 lunar distances, 0.06172 AU), travelling at 10.05 km/second, to the Earth on the 29th May 2018 @ 08:01 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).