The 12 - 28 metre wide asteroid 2018 JL1 will make a close pass (7.4 lunar distances, 0.01910 AU), travelling at 5.67 km/second, to the Earth on the 14th May 2018 @ 05:02 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).