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1988JAVSO..17..130S - J. Am. Assoc. Variable star obs., 17, 130-132 (1988/December-0)
The changing period of AF Scuti.
SCHULMAN E.
Abstract (from CDS):
The RR Lyrae variable AF Scuti was examined for period changes in the interval 1917 through 1988 on the plates of the Maria Mitchelll Observatory collection. The deviation from a constant period was found to be statistically significant and the data indicate that the period is increasing at a rate of 0.072 day per million years.
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