The 34 - 76 metre wide asteroid 2010 DF made a close pass (53.2 lunar distances, 0.1366 AU), travelling at 10.69 km/second, to the Earth-Moon system on the 13th February, 2010.
Orbital elements: 2010 DF Earth MOID = 0.1317 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 300.95844 (2000.0) P Q n 0.77985165 Peri. 208.52858 -0.97430569 -0.09062606 a 1.1689467 Node 324.36271 +0.20381609 -0.74436011 e 0.0474929 Incl. 20.72520 -0.09585105 -0.66160030 P 1.26 H 24.5 G 0.15 U 8