VLTI/MIDI visibilities of CPD-57° 2874 (circles) and the best-fit FRACS visibilities obtained from a χ² minimisation for a distance d = 1.7 kpc (solid curve) and d = 2.5 kpc (dashed curve). The model-fitting was performed simultaneously on the visibilities and spectral flux. The visibilities effectively used for the fit are shown as filled circles together with the corresponding visibility error bars. The good quality of this fit is reflected by a reduced of  ≃0.55 for both distances (see details in Table 4).