Abstract
Differential photoelectric photometry of the Delta Scuti stars HR 4684 and HD 106103 is presented. Membership of these stars to the cluster is established through a compilation from the literature of uvby-β photometry of 69 stars in the direction of Coma Berenices. Reddening and distance are determined to be of E(b-y) = 0.002 and 81.75 pc, respectively. An age for the cluster of 5×108yr is derived by comparison with theoretical isochrones. Values of log Teff and log g are determined for each member star to the cluster. No significant physical difference is found between the variable stars and others with the same physical characteristics. Determination of several Ap stars is established.
