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In this paper, we examine how to receive data recorded by the TESS Space Telescope, process the data, and extract the physical parameters of the planets from them. Today, the most widely used and successful technique for finding exoplanets is the transit method, which is used in this article to study the companion planet of HD 202772A star. By obtaining the light curve and validation data of HD 202772A through the MAST database and using the BLS method, which is the most common method for extracting and determining the transit parameters of the exoplanets from the light curve, the orbital period, the transit depth and the transit duration of the planet was extended 3.3 days, 0.003 and 0.2 day were determined, respectively. Also, the radius of the parent star, which is used to calculate the depth and therefore the radius of the planet, is selected from the TICv8 catalog. Finally, the radius of the target planet 1.38458962 Jupiter radius was obtained, which is a relatively good match with the quantities reported by Wang et al. 2018.

Keywords: Exoplanet, Transit, lightcurve, Transiting Exoplanet Survey Satellite (TESS), HD 202772A planet

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