THE LONG-TERM PERIOD VARIATIONS OF THE SX PHOENICIS STAR CY AQUARII

New photoelectric times of maximum light of the SX Phoenicis variable CY Aquarii are combined with times of maximum light extending over 64 years to determine the long-term period variations. The recent data do not show significant cycle-to-cycle variations as some have reported but the data do clearly show an abrupt period change in 1989 corresponding to a new period of 0.061038645d.