The 22 - 48 metre wide asteroid 2015 GA6 made a close pass (22.4 LD, 0.0575 AU) travelling at 7.14 km/second, to the Earth-Moon system on the 9th April 2015 @ 07:46 UT ±00:07.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).