The 77 - 170 metre wide asteroid 2004 SC56 will make a close pass (54.4 lunar distances, 0.1397 AU), travelling at 13.48 km/second, to the Earth-Moon system on the 9th August 2014 @ 08:42 UT ±00:01.
The 74 m - 170 metre wide asteroid 2004 SC56 will make a close pass (31.6 lunar distances, 0.0811 AU), travelling at 14:52 km/second, to the Earth-Moon system on the 9th August, 2012 @ 00:35 UT ±00:01.
The 74 - 160 metre wide asteroid 2004 SC56 will make a close pass (33.5 lunar distances, 0.0862 AU), travelling at 8.66 km/second, to the Earth-Moon system on the 18th August, 2010 @ 11:12 UT.