The 200 - 460 metre wide asteroid 2015 NZ13 will make a close pass (34.4 LD, 0.0883 AU) travelling at 24.52 km/second, to the Earth-Moon system on the 3rd August 2015 @ 08:14 UT ±00:01.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).