The stellar content and distance of UGC 4483

We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M 81/NGC 2403 complex, Stellar photometry was carried out with HSTphot, and i s complete to V similar or equal to 26.0 and I similar or equal to 24.7, We measure the red giant branch tip at I = 23.56 +/- 0.10, and calculate a di stance modulus of mu (0) = 27.53 +/- 0.12 (corresponding to a distance of 3 .2 +/- 0.2 Mpc), placing UGC 4483 within the NGC 2403 subgroup, We were abl e to measure properties of a previously known young star cluster in UGC 448 3, finding integrated magnitudes of V = 18.66 +/- 0.21 and I = 18.54 +/- 0. 10 for the stellar contribution (integrated light minus Her and [O III] con tribution), corresponding to an age of similar to 10-15 Myr and an initial mass of similar to 10(4) M-circle dot. This is consistent with the properti es of the cluster's brightest stars, which were resolved in the data for th e first time. Finally, a numerical analysis of the galaxy's stellar content yields a roughly constant star formation rate of 1.3 x 10(-3) M-circle dot yr(-1) and mean metallicity of [Fe/H] = -1.3 dex from 15 Gyr ago to the pr esent.