The 68 - 150 metre wide asteroid 2011 ON24 will make a close pass (72.3 lunar distances, 0.1858 AU), travelling at 9.36 km/second, to the Earth-Moon system on the 30th December, 2011 @ 10:27 UT ±00:25.
The 68 - 150 metre wide asteroid 2011 ON24 will make a close pass (70.9 lunar distances, 0.1822 AU), travelling at 7.54 km/second, to the Earth-Moon system on the 16th August, 2011 @ 00:22 UT ±01:18.
Orbital elements:
2011 ON24 Earth MOID = 0.1503 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 306.92886 (2000.0) P Q
n 0.71173668 Peri. 279.85739 +0.72095646 -0.66210878
a 1.2423858 Node 121.93176 +0.69175959 +0.67011361
e 0.1748978 Incl. 13.94567 +0.04111511 +0.33549920
P 1.38 H 23.2 G 0.15 U 7