Orbital elements:
2011 SD191 Earth MOID = 0.2298 AU
Epoch 2011 Sept. 16.0 TT = JDT 2455820.5 MPC
M 42.55773 (2000.0) P Q
n 0.51733281 Peri. 72.68320 +0.83799612 +0.37617993
a 1.5368189 Node 263.70224 -0.51062227 +0.79603764
e 0.2924511 Incl. 23.43361 +0.19242506 +0.47414421
P 1.91 H 17.0 G 0.15
From 23 observations 2011 Sept. 29-Oct. 1