Orbital elements:
2011 QZ13 Earth MOID = 0.2320 AU
Epoch 2011 Aug. 7.0 TT = JDT 2455780.5 MPC
M 324.15233 (2000.0) P Q
n 0.35044101 Peri. 190.43113 +0.77702909 -0.61223787
a 1.9924745 Node 208.95087 +0.59709756 +0.79044946
e 0.3865009 Incl. 17.58637 +0.19924934 +0.01882657
P 2.81 H 20.1 G 0.15
From 13 observations 2011 Aug. 21-25.