Orbital elements:
2012 XK55 Earth MOID = 0.1618 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5 MPC
M 342.46467 (2000.0) P Q
n 0.23477380 Peri. 183.09053 +0.19604229 -0.97616032
a 2.6023735 Node 255.61800 +0.90172862 +0.21678783
e 0.5596487 Incl. 5.51879 +0.38529587 -0.01068031
P 4.20 H 23.9 G 0.15 U 8
The 44 - 97 metre wide asteroid 2012 XK55 will make a close pass (67.6 lunar distances, 0.1738 AU), travelling at 5.75 km/second, to the Earth-Moon system on the 11th December, 2012 @ 18:41 UT ±05:14.