The 270 - 590 metre wide asteroid 2010 BB will make a close pass (21.6 lunar distances, 0.0555 AU), travelling at 9.53 km/second, to the Earth-Moon system on the 26th December, 2012 @ 01:25 UT ±00:03.
Orbital elements: 2010 BB PHA, Earth MOID = 0.0111 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 116.72561 (2000.0) P Q n 1.31505641 Peri. 29.47746 +0.62906153 +0.75875029 a 0.8250998 Node 280.03574 -0.74259017 +0.52223605 e 0.2691362 Incl. 9.88562 -0.22987264 +0.38931671 P 0.75 H 19.8 G 0.15 U 9