Photometric Analysis of TCP J20171288+1156589 - WZ Sge Type Dwarf Nova with Delayed Ordinary Superhumps Emergence

We present the results of photometric analysis of WZ Sge type dwarf nova TCP J20171288+1156589. This object exhibited an outburst with a large amplitude of > 7.9 magnitudes and was observed for over a month. The photometric evolution of the superoutburst was atypical for WZ Sge-type dwarf novae. Early super- humps with a period of 0.0576 ± 0.0001 days were detected during the initial decline. After a plateau phase of approximately 11 days, ordinary superhumps (likely stage B) emerged with a period of 0.0616 ± 0.0001 days, correspond- ing to a superhump excess of ϵ = 0.07. This delay in the onset of ordinary superhumps is an unusual feature among WZ Sge stars. We evaluated the main parameters of the system: mass ratio q = MRD/MW D = 0.29 ± 0.03, yield- ing component masses of MW D ∼ 0.4 ± 0.15M _⊙ for the white dwarf and MRD = 0.11 ± 0.03M _⊙ for the red dwarf donor. The estimated distance to the system is ∼ 800 pc, and the binary separation is a = 0.50 ± 0.03R _⊙ .