The 46 - 100 metre wide asteroid 2018 GX will make a close pass (25.3 lunar distances, 0.06521 AU), travelling at 7.37 km/second, to the Earth on the 7th May 2018 @ 12:19 UT ±00:02.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).