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1981JAVSO..10...11T - J. Am. Assoc. Variable star obs., 10, 11-12 (1981/June-0)
A possible change in the period of HS Aquilae.
THOMPSON K.D.
Abstract (from CDS):
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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