Here is my first attempt at detecting an exoplanet. This was a tricky one for a first attempt as the drop in brightness was only 0.01 magnitude which is right on the limit of my uncertainties. With a little imagination it is just visible. The red lines indicate the predicted start and finish of the transit times (21:54 and 02:18 UT) There are some exoplanets that produce a drop in brightness of 0.02 mag or even greater but on any particular night there is a limited choice of stars to go for. This one is called XO-4b and was found on the Exoplanet Transit Database. My results could look more convincing with more data either side of the transit but dusk and dawn get in the way.