The 95 - 21 metre wide asteroid 2018 GT1 will make a close pass (49.1 lunar distances, 0.12621 AU), travelling at 7.55 km/second, to the Earth on the 17th May 2018 @ 09:41 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).