The 5 - 11 metre wide asteroid 2011 AZ22 made a close pass (1.3 lunar distances, 0.0034 AU), travelling at 12.69 km/second, to the Earth-Moon system on the 9th January, 2011 @ 20:20 UT ±00:17.
Orbital elements: 2011 AZ22 Earth MOID = 0.0022 AU Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 MPC M 21.19606 (2000.0) P Q n 0.33694428 Peri. 311.99532 +0.46849419 -0.87518747 a 2.0453329 Node 109.69320 +0.84372812 +0.40272626 e 0.5747464 Incl. 7.36335 +0.26198483 +0.26806428 P 2.93 H 28.6 G 0.15 U 8