The 31 - 69 metre wide asteroid 2015 DB200 made a close pass (60.1 LD, 0.1545 AU) travelling at 6.16 km/second, to the Earth-Moon system on the 28th February 2015 @ 01:11 UT ±00:33.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).