The 130 - 300 metre wide asteroid (422686) 2000 AC6 will make a close pass (25.0 LD, 0.0643 AU) travelling at 7.40 km/second, to the Earth-Moon system on the 17th February 2015 @ 23:05 UT ±00:01.
The 160 - 370 metre wide asteroid 2000 AC6 will make a close pass (25.0 lunar distances, 0.0643 AU), travelling at 6.85 km/second, to the Earth-Moon system on the 6th December, 2010 @ 19:15 UT. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).