The 140 - 310 metre wide asteroid 2008 CM20 will make a close pass (33.3 lunar distances, 0.0856 AU), travelling at 11.87 km/second, to the Earth-Moon system on the 31st January, 2014 @ 20:59 UT ±00:01.
Orbital elements: 2008 CM20 Earth MOID = 0.0844 AU Epoch 2011 Feb. 8.0 TT = JDT 2455600.5 MPC M 334.15633 (2000.0) P Q n 0.66021578 Peri. 226.47477 -0.95479443 -0.07674054 a 1.3062073 Node 307.00607 +0.23467948 -0.78758831 e 0.2230803 Incl. 21.07750 -0.18246409 -0.61140456 P 1.49 H 21.0 G 0.15 U 2
The 160 - 360 metre wide asteroid 2008 CM20 will make a close pass (50.8 lunar distances, 0.1306 AU), travelling at 11.30 km/second, to the Earth-Moon system on the 2nd February, 2011 @ 06:28 UT ±01:16.