The fit to the mean transit profile of BD+05 4868 A using the transit model ﹩{ \mathcal T }(\phi )﹩, which convolves the dust extinction profile ﹩{ \mathcal Y }(d)﹩ (Equation (1)) with the stellar disk. (a) Decomposition of ﹩{ \mathcal Y }(d)﹩ as a superposition of two generalized-Gaussian distributions representing the trailing and leading tails of the dust cloud. The areas beneath the extinction profiles described by these distributions are indicated by A_b and A_f, respectively. (b) Comparison of the model fit with the observed mean transit profile from TESS data (red). The blue vertical line at ϕ = −0.024 indicates when the planet crosses the central longitude of the host star, with the hatched region indicating the star’s diameter.