Determination of Times of Minima for the Eclipsing Binary GK CEP

Details Determination of Times of Minima for the Eclipsing Binary GK CEP Determination of Times of Minima for the Eclipsing Binary GK CEP

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.0511b&link_type=abstract

American Astronomical Society, 184th AAS Meeting, #05.11; Bulletin of the American Astronomical Society, Vol. 26, p.865

Astronomy and Astrophysics

Astronomy

Scientific paper

The star CK Cep is an eclipsing binary of the W UMa type. This star was studied on several nights from October, 1993, to January, 1994, as part of an undergraduate research experience program at the University of North Texas Astronomy Observatory. Measurements were made using an Optec SSP-3 solid state photometer. Several new determinations of times of primary minima are reported. These newly measured minima together with minima reported by others in the literature were studied for systematic variations in O-C residuals. A periodic fluctuation with period 19.9 years was observed in the O-C residuals. The light elements for GK Cep were revised and a revised ephemeris equation is proposed for predicting future minima.

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