The 19 - 43 metre wide asteroid 2012 CU made a close pass (2.4 lunar distances, 0.0062 AU), travelling at 10.86 km/second, to the Earth-Moon system on the 31st January, 2012 @ 22:16 UT ±00:01.
Orbital elements:
2012 CU Earth MOID = 0.0031 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 33.76087 (2000.0) P Q
n 0.42742959 Peri. 268.12695 +0.16452569 -0.98637254
a 1.7453921 Node 172.40325 +0.90711825 +0.15102110
e 0.5069591 Incl. 0.31022 +0.38738583 +0.06528278
P 2.31 H 25.8 G 0.15 U 6