Update: The 72 - 160 metre wide asteroid 2012 BK11 will make a close pass (68.1 lunar distances, 0.1749 AU), travelling at 3.03 km/second, to the Earth-Moon system on the 12th March, 2012 @ 16:17 UT ±00:47.
The 74 - 160 metre wide asteroid 2012 BK11 will make a close pass (68.1 lunar distances, 0.1749 AU), travelling at 2.99 km/second, to the Earth-Moon system on the 12th March, 2012 @ 11:44 UT ±1 day 23:40.
Orbital elements:
2012 BK11 Earth MOID = 0.1547 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 3.06005 (2000.0) P Q
n 0.39662136 Peri. 256.21545 -0.98268021 -0.18029448
a 1.8346447 Node 273.38488 +0.18223714 -0.89833280
e 0.3777891 Incl. 2.45841 +0.03360392 -0.40061463
P 2.49 H 23.1 G 0.15 U 8