The 7 - 16 metre wide asteroid 2015 OQ21 will make a close pass (1.5 LD, 0.0038 AU) travelling at 7.65 km/second, to the Earth-Moon system on the 24th July 2015 @ 00:00 UT ±00:01.
See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
