Posterior distributions for five relevant model parameters of the fit shown in Fig. 3, out of a total of 27 free parameters (see Methods). We note that there is a degeneracy between the peak optical depth τ₀ and the fill factor f, which is typical for fits of exocomet features that are not optically thick. However, in this example, f is sufficiently tightly constrained to conclude that the star is not fully covered by the cloud. Also note that the radial velocity of the cloud is constrained to within an uncertainty of about 100 m/s, and that the 1σ line width is approximately 5 km/s.