The 190 - 430 metre wide asteroid 2008 RG1 will make a close pass (26.6 lunar distances, 0.0683 AU), travelling at 14.30 km/second, to the Earth-Moon system on the 25th August 2014 @ 22:36 UT ±00:01.
The 190 - 430 metre wide asteroid 2008 RG1 will make a close pass (55.7 lunar distances, 0.1430 AU), travelling at 11.44 km/second, to the Earth-Moon system on the 20th August, 2011 @ 20:21 UT ±00:01.