The 28 - 63 metre wide asteroid 2011 YE40 made a close pass (10.0 lunar distances, 0.0257 AU), travelling at 12.84 km/second, to the Earth-Moon system on the 30th December, 2011 @ 14:24 UT ±00:02.
Orbital elements:
2011 YE40 Earth MOID = 0.0228 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 52.19764 (2000.0) P Q
n 0.73389135 Peri. 183.33067 -0.18754821 -0.89987802
a 1.2172549 Node 277.75573 +0.91013656 -0.00843573
e 0.1740806 Incl. 23.41530 +0.36942808 -0.43606008
P 1.34 H 24.9 G 0.15 U 8