The 15 - 33 metre wide asteroid 2011 OD18 made a close pass (0.5 lunar distances, 0.0012 AU), travelling at 9.27 km/second, to the Earth-Moon system on the 28th July, 2011 @ 06:38 UT ±10:34.
Orbital elements:
2011 OD18 Earth MOID = 0.0008 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 16.36039 (2000.0) P Q
n 0.31331650 Peri. 332.25721 +0.11886538 +0.99085946
a 2.1469102 Node 304.50301 -0.89604557 +0.07937233
e 0.5471110 Incl. 4.43914 -0.42775385 +0.10907595
P 3.15 H 26.3 G 0.15 U 9