Top: The Sun during its activity maximum in 2014. The transit path of Jupiter in front of solar latitude −17.5° is marked with dashed lines. The largest sunspot group of the solar cycle, AR2191 is close to the centre of the transit path. The properties of the spot group were reconstructed based on the simulated transit light curve of Jupiter. The inner blue circle indicates the position and size of the dark region, if the beginning and end of the eclipse over the spot group are taken as t_in and t_out, respectively. The outer circle represents the spot group if the eclipse times are adjusted to t_in − σ_DR and t_out + σ_DR. Below: Simulated transit light curve of Jupiter, in front of −17.5° solar latitude. The light curve has similar noise properties as high precision TESS observations. A model assuming one dark region (orange) and an unspotted photosphere (blue) is shown on top of the light curve.