On June 15 , 2009 UT the transit of TrES-2b was detected using the University of Arizona ’ s 1.55 meter Kuiper Telescope with 2.0-2.5 millimag RMS accuracy in the I-band .
We find a central transit time of T _ { c } = 2454997.76286 \pm 0.00035 HJD , an orbital period of P = 2.4706127 \pm 0.0000009 days , and an inclination angle of i = 83 ^ { \circ } .92 \pm 0.05 , which is consistent with our re-fit of the original I-band light curve of O ’ Donovan et al .
( 2006 ) where we find i = 83 ^ { \circ } .84 \pm 0.05 .
We calculate an insignificant inclination change of \Delta i = -0 ^ { \circ } .08 \pm 0.07 over the last 3 years , and as such , our observations rule out , at the \sim 11 \sigma level , the apparent change of orbital inclination to i _ { predicted } = 83 ^ { \circ } .35 \pm 0.1 as predicted by Mislis & Schmitt ( 2009 ) and Mislis et al .
( 2010 ) for our epoch .
Moreover , our analysis of a recently published Kepler Space Telescope light curve ( Gilliland et al .
2010 ) for TrES-2b finds an inclination of i = 83 ^ { \circ } .91 \pm 0.03 for a similar epoch .
These Kepler results definitively rule out change in i as a function of time .
Indeed , we detect no significant changes in any of the orbital parameters of TrES-2b .