Observations of Eclipsing Binary Stars. I. 150 Times of Minima

Volume 53 number 2 (2025)

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Gary W. Billings

P.O. Box 263, Rockyford, AB T0J 2R0, Canada; obs681@gmail.com

Abstract

Herein I report 150 times of minima for 35 eclipsing binary stars. Many have limited observational history, so published light elements often yield eclipse predictions several hours in error. Three are examined via eclipse timing variation diagrams (V395 Cam, V924 Cep, and V1179 Cas), which show period changes. V953 Cep light curves around the primary eclipse at seven different dates show a changing light curve confirming its RS CVn behavior. Time series photometry supporting all reported times of minimum are archived in the AAVSO International Database.