The 19 - 41 metre wide asteroid 2012 XB made a close pass (18.9 lunar distances, 0.0485 AU), travelling at 6.26 km/second, to the Earth-Moon system on the 29th November, 2012 @ 13:05 UT ±00:31.
Orbital elements:
2012 XB Earth MOID = 0.0490 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5 MPC
M 324.53870 (2000.0) P Q
n 0.75135314 Peri. 163.81081 +0.58261491 -0.79155214
a 1.1983214 Node 250.19503 +0.72225764 +0.60828833
e 0.1401226 Incl. 11.30301 +0.37269795 +0.05857072
P 1.31 H 25.8 G 0.15 U 7