SDSS J155720.75+180720.2 outburst SU UMa star. Gaia18dzl AT2018kwb 2018-12-24 21:43:47 239.33652 18.12227 15.92 18.36 1.11 CV 2018-12-26 23:39:28 known CV SDSS J155720.75+180720.2 brightens by more than 2 mags