  Eleven transit light curves for the exoplanet WASP-140b were studied with the
primary objective to investigate the possibility of transit timing variations
(TTVs). Previously unstudied MicroObservatory and Las Cumbres Global Telescope
Network photometry were analysed using Markov Chain Monte Carlo techniques,
including new observations collected by this study of a transit in December
2021. No evidence was found for TTVs. We used two transit models coupled with
Bayesian optimization to explore the physical parameters of the system. The
radius for WASP-140b was estimated to be $1.38^{+0.18}_{-0.17}$ Jupiter radii,
with the planet orbiting its host star in $2.235987 \pm 0.000008$ days at an
inclination of $85.75 \pm 0.75$ degrees. The derived parameters are in formal
agreement with those in the exoplanet discovery paper of 2016, and somewhat
larger than a recent independent study based on photometry by the TESS space
telescope.
