Left: spectral energy distribution of the composite stellar model of the DSO as function of the viewing angle. The points represent observationally inferred values. Different viewing angles from 0° up to 180° are labelled by different colours according to the key. Right: linear polarization degree as function of wavelength for different viewing angles (see the key). The vertical thick line marks the values along the K_s band (2.2 μm), the horizontal line denotes the value of p_L = 30%, which is close to observationally inferred values for four consecutive epochs (2008, 2009, 2011, 2012; Shahzamanian et al., 2016).