A Photometric Study of the Near-Contact Binary CE Pegasi
Volume 54 number 1 (2026)
- Edward J. Michaels
- Waffelow Creek Observatory, 10780 FM 1878, Nacogdoches, TX 75961; astroed@ejmj.net
Abstract
Presented are multi-band photometry for the eclipsing binary CE Pegasi observed on 17 nights in August and September 2025. A photometric light curve solution was derived from the Wilson-Devinny program using observations from five passbands (B, V, g', r', and i'). The results indicate that CE Peg is a semidetached near-contact binary with a mass ratio of q = 0.315 and an orbital inclination of 83°. The cooler K6 secondary star fills its Roche lobe and the F0 primary nearly so with a filling factor of 96.8%. The period analysis using 35 minima timings, spanning 30 years, found an unchanging orbital period of 0.6420292 d.