Supernova 2018aoq and a distance to Seyfert galaxy NGC 4151
  We present optical photometric observations of SN 2018aoq from 2 to 100 days
after explosion, and 7 spectra at epochs from 11 to 71 days. The light curves
and spectra are typical for SNe II-P. As previously reported, SN 2018aoq
appears to be of intermediate brightness between subluminous and normal SNe
II-P. SN 2018aoq was discovered in Seyfert galaxy NGC 4151, for which the
distance is uncertain. We utilised the Expanding Photosphere Method using three
sets of filter combinations and velocities derived from the absorption minima
of FeII lines and obtained a distance of 20.0 +-1.6 Mpc. The Standard Candle
Method applied to SN 2018aoq yields a distance of 16.6 +-1.1 Mpc. Both values
are consistent with the distance measurements for NGC 4151 based on geometric
method.
