The 79 - 180 metre wide asteroid 2018 JO will make a close pass (58.2 lunar distances, 0.14957 AU), travelling at 19.97 km/second, to the Earth on the 14th May 2018 @ 20:01 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).