The new exoplanet TOI1147b

The new exoplanet TOI1147b. For my project, I took ground-based measurements of the known HD189733 system, which increased my interest in discovering exoplanets and measuring these new, extrasolar systems for the first time. For this purpose, I looked for periodic transit events in the light curves of the TESS space telescope and observed interesting stars using the STELLA telescope on Tenerife. Using the radial velocity method, I was able to calculate whether there were other planets in this system. The new exoplanet TOI1147b has a mass of 1.3 Jupiter masses and a radius of 2.3 Jupiter radii. It can therefore be categorised as a puffy exoplanet. It has a highly elliptical orbit, and its parent star is an evolving, sun-like star. There is also a third, long-period object in the system.