Polarized intensity phase function (green data points) and reconstructed total intensity phase function (red data points) obtained from the SPHERE Q_φ image. The phase functions have been normalized to their peak value and the error bars show 1σ uncertainties determined from the U_φ image. A bell-shaped degree of polarization (purple dashed line) was used to reconstruct the total intensity phase function. The dotted lines show numerically calculated phase functions in J band for DIANA standard dust opacities (Woitke et al. 2016) and a compact dust aggregate (Min et al. 2016).