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.