The 5 - 10 metre wide asteroid 2011 FA23 made a close pass (2.1 lunar distances, 0.0054 AU), travelling at 14.07 km/second, to the Earth-Moon system on the 1st April, 2011 @ 03:12 UT ±00:01.
Orbital elements:
2011 FA23 Earth MOID = 0.0001 AU
Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 MPC
M 329.36453 (2000.0) P Q
n 0.33648138 Peri. 55.59113 -0.39335828 +0.91935585
a 2.0472083 Node 191.25237 -0.85540550 -0.36890471
e 0.5901801 Incl. 2.15992 -0.33697283 -0.13672652
P 2.93 H 28.9 G 0.15 U 7