The 110 - 240 metre wide asteroid 2011 OY17 will make a close pass (29.1 lunar distances, 0.0748 AU), travelling at 9.05 km/second, to the Earth-Moon system on the 24th August, 2011 @ 01:26 UT ±20:04.
Orbital elements:
2011 OY17 Earth MOID = 0.0530 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 357.62485 (2000.0) P Q
n 0.26573339 Peri. 189.74964 +0.97131468 +0.22926771
a 2.3961019 Node 156.70214 -0.20601148 +0.94387167
e 0.5581622 Incl. 9.18312 -0.11877314 +0.23778686
P 3.71 H 22.0 G 0.15 U 8