The 21 - 47 metre wide asteroid 2018 KN2 will make a close pass (6.1 lunar distances, 0.01566 AU), travelling at 8.04 km/second, to the Earth on the 29th May 2018 @ 15:11 UT ±00:01.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).