2016JAVSO..44..101S

V428 Cep (of NSV 395) is a faint 15th magnitude binary observed in a study of the open cluster NGC 188. However, its distance from the core of the cluster might exclude its membership. Its light curve was classified as a short period EB type eclipsing binary with a period of 0.3079 d and an amplitude of ∼0.7 mags in all curves. The difference in component temperatures is some Delta T = 180 K and its fill-out is a hefty 35%. A brief, 2.5 year period study yields, as expected, a constant period, which is 0.3076789 d. More monitoring is needed to determine its true orbital evolution. The inclination, 80 degrees, is not quite enough to produce total eclipses, so a q-search was performed. Our lowest residual solution gives a q = 0.4. A cool spot was modeled on the primary component to take care of the light curve asymmetries. V428 Cep is a K-type W UMa contact binary.