Orbital elements:
2013 OQ3 Earth MOID = 0.3242 AU
Epoch 2013 July 7.0 TT = JDT 2456480.5 MPC
M 271.21467 (2000.0) P Q
n 0.31116287 Peri. 297.81719 -0.07397931 -0.92637502
a 2.1568049 Node 148.63255 +0.96076419 +0.03304853
e 0.4805185 Incl. 45.18682 -0.26731860 +0.37514946
P 3.17 H 17.9 G 0.15
From 14 observations 2013 July 16-17.