The Changing Period of V1303 Sagittarii

Volume 15 number 2 (1986)

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Amy S. Barton
Maria Mitchell Observatory,

Abstract

V1303 Sgr, an 18-day Population II Cepheid, was studied for period changes. The deviation from a constant period was found to be statistically significant, an dthe data indicate that the period is decreasing at the rate of 0.0025 cycle per century.