Period Changing of DY Pegasi Variable Star

Abstract

This research was aimed to study the period change of DY Pegasi variable star. We conducted this research at Regional Observatory for the Public, Nakhon Rattchasima, National Astronomical Research Institute of Thailand (Public Organization). The observation was done via CCD photometer in blue (B) visible (V) and red (R) filters. The data were employed to analyze and plot light curves. The period change analysis by O-C diagram was shown the decreasing rate at 5.4044×10-13day/cycle (0.234 msec/year). The result likely showed that the DY Pegasi was collapsed similar to V1162 Orionis variable star.