Spectral sequence of SN 2020aeuh at late phases. Our seven spectra between 81 and 181 days past first detection, when the SN is clearly dominated by CSM interaction, are displayed. The smoothed spectra (using a Savitzky–Golay filter) are shown in solid lines, while the original in semi-transparent. The spectral evolution is rather slow during these 100 days. The spectrum with best signal, at 99 days, is compared to spectra of other SNe in Fig. 5.