The 14 - 32 metre wide asteroid 2018 KR will make a close pass (15.6 lunar distances, 0.04030 AU), travelling at 4.03 km/second, to the Earth on the 28th May 2018 @ 19:01 UT ±00:01.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).