The 14 - 31 metre wide asteroid 2018 JX1 will make a close pass (9.3 lunar distances, 0.02396 AU), travelling at 7.70 km/second, to the Earth on the 15th May 2018 @ 09:15 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).