Orbital elements:
2011 QA14 Earth MOID = 0.1079 AU
Epoch 2011 Aug. 7.0 TT = JDT 2455780.5 MPC
M 3.56397 (2000.0) P Q
n 0.29106950 Peri. 114.14217 +0.45220568 +0.89188425
a 2.2549569 Node 182.77509 -0.86299032 +0.43547476
e 0.5482421 Incl. 8.60749 -0.22529479 +0.12208281
P 3.39 H 23.3 G 0.15
From 9 observations 2011 Aug. 22-24.
The 68 - 150 metre wide asteroid 2011 QA14 made a close pass (42.0 lunar distances, 0.1079 AU), travelling at 9.61 km/second, to the Earth-Moon system on the 19th August, 2011 @ 23:13 UT ±01:08.