The 32 - 71 metre wide asteroid 2017 UT2 will make a close pass (73.3 lunar distances, 0.18837 AU), travelling at 6.98 km/second, to the Earth on the 24th May 2018 @ 08:08 UT ±00:48.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
