[vsnet-newvar 9771] ASASSN-15cm: SU UMa star with Porb=0.2085 d

ASASSN-15cm: SU UMa star with Porb=0.2085 d

Using ZTF (Masci et al., 2019) and ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data, I found that this object showed a superoutburst in 2019 Aug. Like BO Cet with the same set of data (arXiv:2302.02593 = VSOLJ Variable Star Bulletin No. 106), I obtained a period of 0.2196(1) d, 5.3% longer than the orbital period. This corresponds to q about 0.22 (arXiv:2201.02945 = VSOLJ Variable Star Bulletin No. 89). The core of the secondary of this object appears to be evolved (Thorstensen et al. 2016 AJ 152, 226) and this probably enabled a relatively small q. Another apparent superoutburst was also recorded in 2022 Jan. and future direct detection of superhumps are wanted.