AAVSO HOME > publications > ejaavso

A Period Study of the Eclipsing Binary GK Cephei




Raymond D. Benge, Jr.

James A. Roberts

University of North Texas

Denton, Texas 76203-5368


Presented at the Spring Meeting of the AAVSO, May 21, 1994




Several new determinations of times of minima based upon photoelectric measurements of the eclipsing binary GK Cephei are reported. These measurements, together with times of minima previously reported in the literature, permit an improvement to the ephemeris equation for GK Cep. Analysis of O-C residuals determined from linear ephemeris equations suggests a periodic oscillation with a period of 18.6 years. Inclusion of a sinusoidal term in the ephemeris equation with this period greatly improves the fit of the ephemeris equation with reported observations of times of minima.


Article on ADS


  search engine |  site map |  links |  contact us