* Astronomy

The 330 - 730 metre wide asteroid 2000 WL63 will make a close pass (69.0 lunar distances, 0.1772 AU), travelling at 10.35 km/second, to the Earth-Moon system on the 26th December, 2012 @ 16:20 UT ±00:01. 

See more 

The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).