Transit Evolution of HD189733b

Significant physical parameters are known about the exoplanet HD189733b that was discovered in 2005: mass $m \quad =$ 1.142 Jupiter masses, period $P \quad =$ 2.21857 days, and semi-major axis $a \quad =$ 0.03142 AU for its orbit around the spectral type K star. We investigate the evolution of the transits through a combination of historical data and photometric data taken in 2017 in the R-band with a 16-in remote telescope at the Dark Skies Observatory Collaborative in West Texas. The data are reduced and modeled to extract measurements and to deduce transit parameters. We examine trends in the transit midpoint timing, depth, width and asymmetry of the curves of HD189733b. We present a summary of changes in these parameters in relation to heating and bow shock around the planet.