The 1400 - 3200 metre wide asteroid 1999 RD32 will make a close pass (57.9 lunar distances, 0.1488 AU), travelling at 18.80 km/second, to the Earth-Moon system on the 14th March, 2012 @ 10:40 UT ±00:01. See moreThe Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).