Description
New CCD light curves in the V, Rc, and Ic bands of the W UMa-type eclipsing binary system KAO-EGYPT J214258.21+440520.2 were obtained using the 1.88 m reflector telescope at Kottamia Astronomical Observatory (KAO), Egypt, on September 27 and 28, 2016. Based on these observations, new times of minima and a revised ephemeris have been determined. The geometric and photometric parameters of the system were derived using Binary Maker 3.0 (BM3) and the PHOEBE program. Light curve analysis indicates that KAO-EGYPT J214258.21+440520.2 is a semi-detached binary system with an orbital period of P = 0.617898 days and a mass ratio of q = 0.5491. Based on the estimated effective temperatures of the primary (T₁ = 5830 K) and secondary (T₂ = 4820 K) components, the spectral types are classified as G2 and K3, respectively.
Keywords:
Eclipsing binary stars; W UMa-type systems; Light curve analysis; KAO-EGYPT J214258.21+440520.2; CCD photometry; Semi-detached binary.
| Stream | Science or Engineering |
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