Orbital elements:
2012 GC Earth MOID = 0.0713 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 338.34346 (2000.0) P Q
n 0.65222111 Peri. 192.09212 -0.90611507 +0.41721291
a 1.3168596 Node 13.24239 -0.35822974 -0.66884694
e 0.1887505 Incl. 17.77228 -0.22500429 -0.61528625
P 1.51 H 24.5 G 0.15 U 8
The 35 - 78 metre wide asteroid 2012 GC will make a close pass (29.0 lunar distances, 0.0746 AU), travelling at 9.74 km/second, to the Earth-Moon system on the 5th April, 2012 @ 02:28 UT ±00:35.