SIMBAD references

We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V≃26.0 and I≃24.7. We measure the red giant branch tip at I=23.56±0.10, and calculate a distance modulus of µ₀=27.53±0.12 (corresponding to a distance of 3.2±0.2Mpc), placing UGC 4483 within the NGC 2403 subgroup. We were able to measure properties of a previously known young star cluster in UGC 4483, finding integrated magnitudes of V=18.66±0.21 and I=18.54±0.10 for the stellar contribution (integrated light minus Hα and [Oiii] contribution), corresponding to an age of ∼10-15Myr and an initial mass of ∼10⁴M_☉. This is consistent with the properties of the cluster's brightest stars, which were resolved in the data for the first time. Finally, a numerical analysis of the galaxy's stellar content yields a roughly constant star formation rate of 1.3x10^–3M_☉.yr^–1 and mean metallicity of [Fe/H]=-1.3dex from 15Gyr ago to the present.