The 80 - 180 metre wide asteroid 2008 YQ27 will make a close pass (38.6 lunar distances, 0.0991 AU), travelling at 12.74 km/second, to the Earth-Moon system on the 20th December, 2011 @ 20:03 UT ±1 day 22:40.
Orbital elements: 2008 YQ27 Earth MOID = 0.0003 AU Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC M 314.70539 (2000.0) P Q n 0.66347595 Peri. 48.86616 -0.78688859 -0.55925152 a 1.3019249 Node 95.53288 +0.45791247 -0.81253821 e 0.3047167 Incl. 15.19314 +0.41366958 -0.16437578 P 1.49 H 22.5 G 0.15 U 8