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A Possible Change in the Period of Hs-Aquilae

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Kristin D. Thompson

Maria Mitchell Observatory, Nantucket, MA 02554




The period of the long-period variable, HS Auilae, has been determined from photographs in the interval 1917-1980, and the recent residuals are found to deviate from the 267-day period determined by Harwood. Due to a large gap in the data during the 1950s and 1960s, it is not possible to tell whether the deviations are caused by an increase or a decrease of the period.


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