GSC 00143-00813, a New Triple-mode Classical Cepheid

I present my detection of a new triple-mode Classical Cepheid, pulsating in the fundamental mode, first- and second-overtone modes. I analyzed all observations available for the star in the ASAS-SN and ZTF online public archives using the period-search software developed by Dr. V.P.~Goranskij for Windows environment. Light elements and parameters of the light curves for the three oscillations were obtained.