The 4 - 9 metre wide asteroid 2017 JB2 will make a close pass (71.4 lunar distances, 0.18360 AU), travelling at 7.03 km/second, to the Earth on the 15th May 2018 @ 06:58 UT ±00:04.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).