The 97 - 220 metre wide asteroid 2016 LJ49 will make a close pass (67.1 lunar distances, 0.17254 AU), travelling at 24.48 km/second, to the Earth on the 21st May 2018 @ 02:19 UT ±00:01.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).