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All available CCD observation of RV UMa have been analyzed to obtain anaccurate mathematical description of the ligh variation. We discuss in thispaper a new study of variable star RV UMa, a short period RRab star, in ortherto determine through the light curve and the physical parameters, the presenceof "Blazhko effect". The Star were observed for a total of 839 sessionsshooting, and exhibits light curve modulation with the shortest modulationPeriod=0.468002 ever observed. The result detect small but definitemodification in temperature and mean radius of the star itself. All results arecompared with previously published literature values and discussed.

New CCD Photometry Study of RV UMa