Update: The 45 - 100 metre wide asteroid 2011 XD will make a close pass (42.6 lunar distances, 0.1095 AU), travelling at 7.61 km/second, to the Earth-Moon system on the 7th January, 2012 @ 13:47 UT ±00:01.
The 46 - 100 metre wide asteroid 2011 XD will make a close pass (43.8 lunar distances, 0.1125 AU), travelling at 7.74 km/second, to the Earth-Moon system on the 7th January, 2012 @ 16:48 UT ±2 days 04:40.
Orbital elements:
2011 XD Earth MOID = 0.0471 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 237.48513 (2000.0) P Q
n 0.66870946 Peri. 82.65367 -0.95817708 -0.23186438
a 1.2951232 Node 83.83211 +0.14644248 -0.90084062
e 0.3495299 Incl. 9.71302 +0.24586844 -0.36704915
P 1.47 H 24.0 G 0.15 U 9