We analysed the quiescent magnitudes and outburst intervals of SS Cyg selected and measured, respectively, from the long-term visual light curve covering 96 yrs. It is significant that both Kiplinger et al. The 7.2 yr modulation is superposed on this long-term variation and the total amplitude is 0.23 mag. This result is a clear confirmation of the discussion given in Sect. RX And, and with and yr for outburst intervals of RU Peg.
Annual gaps are apparent in the power spectrum.
Since SU UMa stars are below the period gap, cycles found in the long-term visual light curves of these stars support this hypothesis. In this study, we found cyclical variations in the quiescent magnitudes of 7 SU UMa stars.