pi PsA--Who Are You?

Volume 20 number 1 (1991)

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Axel Thomas

Geographisches InstitŸt, Johannes Gutenberg UniversitŠt, D-65 Mainz, Germany

Abstract

Visual estimates are presented that show š PsA to have a semiregular light curve with an average amplitude of 0.7 magnitude and a period of approximately 8.625 days.  These results are in contrast to the available literature, that either calls š PsA a small-amplitude Cepheid or states that the star was not variable in 1964 and 1970.  Spectra and absolute magnitude indicate that the star lies outside the instability strip.