Nowadays popularity of exoplanetaryastronomy increases. Research objectsof this branch are extrasolarplanets and systems into which structure they are included. Among other methods of exoplanetsresearch the transit method. Precision photometric supervision of exoplanetarysystems allows to reveal a number of thin effects which, may be a key to understanding of the physical processes proceeding in system. High precision photometry allows to study temporary characteristics of transits that taking into account the phenomenon of an orbital resonance in the long term gives the chance to find new planets.