UW-CVN - AN ECLIPSING BINARY-SYSTEM OF W-UMA TYPE

Using new CCD observations of UW CVn we show that this star - previous ly classified as a delta Scuti variable - is in fact a W UMa type ecli psing binary. From the photometric point of view it belongs to the sub class W. The solution of the light curve indicates over-contact geomet ry, total eclipse, and quite small - for a W type binary - mass ratio (0.245). The smaller secondary is considerably hotter than the primary , the temperature difference amounting to about 400 K. Moreover, analy sis of all available data leads us to the conclusion that the orbital period has changed.