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eJAAVSO

The Changing Period of V1303-SAGITTARII

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Amy S. Barton

Maria Mitchell Observatory, Nantucket, MA 02554

 

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.

 

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