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This study analyzes 338 new times of visual, CCD, photoelectric andphotographic maxima of the classical Cepheid SV Vul. The correspondingobservations were made between 1913 and 2022. On this new and largeobservational basis, the period variations of this star of major astrophysicalinterest are re-visited. Without contradicting the theory or previous studies,we show that visual observations are important for a long-term monitoring ofthe period variations of well-selected bright Cepheids. This study establishesthe period rate of change of SV Vul at -250 s/yr. Its period is currentlyshorter than 45 days.

Period variation of the classical Cepheid SV Vulpeculae over a century (1913-2022)