Using minima derived from
photographic observations on the plates of the Maria Mitchell Observatory and
Sternberg Institute collections or found in the literature, covering a very
wide range of Julian dates (2420300-2448120), we find that the eclipsing
variable CF Sct, with two previously reported period values somewhat
contradicting each other (31.9415 and 31.9384 days), actually shows a quite constant
period of 31.94036 days over decades.