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Sorting Out the Period of XY Cassiopeiae

Volume 15 number 1 (1986)

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James D. Fahn
Maria Mitchell Observatory

Abstract

A survey of Harvard College Observatory and Maria Mitchell Observatory plates was undertaken to clear up confusion surrounding the period of the 10th magnitude Cepheid, XY Cassiopeiae. New elements indicate a probable decrease in the period but do not confirm other period changes referred to in earlier studies.