Orbital elements:
2011 CP4 PHA, Earth MOID = 0.0189 AU
Epoch 2012 Mar. 14.0 TT = JDT 2456000.5 MPC
M 336.42410 (2000.0) P Q
n 1.13267811 Peri. 159.86074 +0.61701394 +0.78215266
a 0.9114476 Node 148.05825 -0.74261776 +0.61519312
e 0.8702337 Incl. 9.44091 -0.26040862 +0.09886677
P 0.87 H 21.2 G 0.15 U 5
The 160 - 350 metre wide asteroid 2011 CP4 will make a close pass (9.1 lunar distances, 0.0233 AU), travelling at 30.47 km/second, to the Earth-Moon system on the 23rd February, 2012 @ 14:07 UT ±00:17.
Orbital elements: 2011 CP4 PHA, Earth MOID = 0.0183 AU Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 MPC M 242.23445 (2000.0) P Q n 1.13981847 Peri. 158.91097 +0.61228153 +0.78658417 a 0.9076371 Node 148.68245 -0.74564028 +0.60811155 e 0.8572510 Incl. 8.85133 -0.26292947 +0.10717130 P 0.86 H 21.3 G 0.15 U 9