The 850 - 1900 metre wide asteroid 2005 UJ159 will make a close pass (0.2699 AU), travelling at 0.27 km/second, to the Earth-Moon system on the 29th December, 2011 @ 17:55 UT ±00:01.
Orbital elements:
2005 UJ159 PHA, Earth MOID = 0.0342 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 332.20528 (2000.0) P Q
n 0.16092392 Peri. 95.40271 -0.81561855 -0.08269078
a 3.3475134 Node 80.84428 -0.19659528 -0.89124172
e 0.8311899 Incl. 35.45339 +0.54416604 -0.44592649
P 6.12 H 17.6 G 0.15 U 1