The 150 - 340 metre wide asteroid 2004 XL14 will make a close pass (76.3 lunar distances, 0.1962 AU), travelling at 18.32 km/second, to the Earth-Moon system on the 20th December, 2012 @ 03:01 UT ±00:01.
The 150 - 340 metre wide asteroid 2004 XL14 will make a close pass (48.8 lunar distances, 0.1254 AU), travelling at 16.32 km/second, to the Earth-Moon system on the 21st December, 2010 @ 14:04 UT ±1 minute.