Abstract
The study of exoplanetary systems is an important field of research, which increased our understanding of the universe and gave additional opportunities to study the physical and dynamic properties of planetary systems. To this day the list of confirmed exoplanets are near 4000. The purpose of this work is to identify some of the static patterns of exoplanetary systems by statistical analysis according to the latest European catalog data on exoplanetary systems. Such an analysis is necessary for the further study of exoplanetary systems, especially when studying the dynamic evolution in the nonstationary stage. In connection with the development of the instrumental base and the improvement of the search methods, earth-like planets are discovered, like the rocky planet Ross 128b. We performed a statistical analysis of the number of exoplanets depending on the spectral class of the central star. It turned out that most of the known exoplanets revolve around stars of the F, G, K and M spectral classes. We have revealed that stars of class G have the greatest number of exoplanetary systems, respectively the spectral class G has the greatest number of exoplanets Interestingly, most exoplanets have inclinations between 80 and 95 degrees, while eccentricities can be different. The distribution of exoplanets were constructed according to the argument of the pericenter and the inclination of the orbits.