The 27 - 61 metre wide asteroid 2010 CL made a close pass (20.9 lunar distances, 0.0538 AU), travelling at 12.73 km/second, to the Earth-Moon system on the 2nd February, 2010. See more
The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Orbital elements: 2010 CL Earth MOID = 0.0451 AU Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC M 1.86164 (2000.0) P Q n 0.50265739 Peri. 136.16371 -0.06190690 -0.97413800 a 1.5665875 Node 316.00026 +0.80770115 +0.07900842 e 0.3882659 Incl. 18.22976 +0.58633300 -0.21169038 P 1.96 H 25.0 G 0.15 U 7