The 54 - 120 metre wide asteroid 2011 SA25 made a close pass (74.1 lunar distances, 0.1904 AU), travelling at 12.82 km/second, to the Earth-Moon system on the 21st September, 2011 @ 07:39 UT ±01:00.
Orbital elements:
2011 SA25 Earth MOID = 0.1817 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 325.41644 (2000.0) P Q
n 0.51206814 Peri. 41.10371 +0.82881607 -0.55657086
a 1.5473345 Node 352.06829 +0.33915646 +0.58131030
e 0.2666887 Incl. 24.57221 +0.44501327 +0.59355472
P 1.92 H 23.9 G 0.15 U 8