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Three Unusual Variables in Cygnus

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Karen Meech

Maria Mitchell Observatory, Nantucket, MA 02554

Abstract

Three suspected variables in Cygnus were examined on the plates of the Maria Mitchell Observatory. All three prove to be of an unusual type: S4802 is apparently semiregular with cycles on the order of 80 days; S4831 is probably RV Tauri type with half cycle lengths ranging from 120 to 160 days; S4846 is an unusual star with long-period semiregular cycles interrupted by intervals of relative quiescence. A beat phenomenon may be present. Details of these stars are published in the Information Bulletin on Variable Stars of the International Astronomical Union.