The 640 - 1400 metre wide asteroid 85953 (1999 FK21) will make a close pass (49.40 lunar distances, 0.12693 AU), travelling at 17.46 km/second, to the Earth on the 6th April 2018 @ 17:47 UT ±00:01.
The 590 metre wide asteroid 1999 FK21 will make a close pass (74.3 lunar distances, 0.1910 AU), travelling at 24.29 km/second, to the Earth-Moon system on the 18th February 2014 @ 08:45 UT ±00:01.
The 590 metre wide asteroid 1999 FK21 will make a close pass (69.6 lunar distances, 0.1789 AU), travelling at 16.57 km/second, to the Earth-Moon system on the 3rd April, 2011 @ 02:05 UT ±00:01.