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We report on the discovery of Cepheids in the spiral galaxy NGC 2841, basedon observations made with the Wide Field and Planetary Camera 2 on board theHubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555Wfilter, and over 5 epochs using the F814W filter. Photometry was performedusing the DAOPHOT/ALLFRAME package.  We discovered a total of 29 variables, including 18 high-quality Cepheidswith periods ranging from 15 to 40 days. Period-luminosity relations in the Vand I bands, based on the high-quality Cepheids, yield an extinction-correcteddistance modulus of 30.74 +/- 0.23 mag, which corresponds to a distance of 14.1+/- 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of 18.50+/- 0.10 mag (D = 50+/- 2.5 kpc) and a metallicity dependence of the CepheidP-L relation of gamma (VI) = -0.2 +/- 0.2 mag/dex.

The Discovery of Cepheids and a New Distance to NGC 2841 Using theHubble Space Telescope