A rare outburst of the WZ Sge-type dwarf nova PQ Andromedae.

We present the light curve of the 2020 outburst of PQ Andromedae, which was only the fourth confirmed on record, with a mean interval of 27 years. The outburst was detected at magnitude 10.5, representing an amplitude of -8.6 magnitudes above mean quiescence of 19.1. The main part of the outburst lasted about 53 days, although it is likely that the first part was missed. The system underwent five dramatic rebrightening episodes during the decline phase, the longest appearing as an eight-day plateau in the light curve. Long photometry runs were not possible due to the short observing window. Humps were detected during one run which resembled superhumps. The strongest signal in the photometry was at 17.835(35) cycles/d, or 0.05607(11) d. The system was still slightly above quiescence more than 800 days after the outburst started. The observed characteristics of PQ And are consistent with it being a member of the WZ Sge subclass. Moreover, in terms of outburst frequency and amplitude, orbital period, and light curve characteristics, PQ And appears to be a close sibling of WZ Sge itself. [ABSTRACT FROM AUTHOR]