The 680 - 1500 metre wide asteroid 2011 SL102 will make a close pass (76.4 lunar distances, 0.1962 AU), travelling at 6.01 km/second, to the Earth-Moon system on the 28th December, 2011 @ 05:14 UT ±02:20.
Orbital elements:
2011 SL102 Earth MOID = 0.2548 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 324.78679 (2000.0) P Q
n 0.25777852 Peri. 41.40588 -0.22379437 -0.96283320
a 2.4451466 Node 62.03373 +0.84311053 -0.26908935
e 0.5035389 Incl. 9.85857 +0.48895881 +0.02330547
P 3.82 H 17.6 G 0.15 U 9