The 20 - 45 metre wide asteroid 2012 HB2 made a close pass (11.4 lunar distances, 0.0294 AU), travelling at 3.47 km/second, to the Earth-Moon system on the 20th April, 2012 @ 12:14 UT ±02:15.
Orbital elements:
2012 HB2 Earth MOID = 0.0271 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 338.33375 (2000.0) P Q
n 0.60070927 Peri. 141.29539 -0.86998953 +0.49238262
a 1.3911047 Node 68.22067 -0.45906931 -0.78960348
e 0.2612762 Incl. 1.60626 -0.17992659 -0.36617715
P 1.64 H 25.6 G 0.15 U 6