VRI photometry of the type Ia supernova 2002bo is presented. This SN exploded in a dusty region of the host galaxy NGC 3190, thus, subtraction of a template frame was necessary to obtain reliable photometry. We used a template frame of NGC 3190 taken during the course of our galaxy imaging project, fortunately, just a few days before SN 2002bo was discovered. The aim of this project is to collect template frames of nearby galaxies that are potential hosts of bright SNe. Subtraction of pre-SN images helped us to exclude the background light contamination of the host galaxy. The maximum occurred at JD 2,452,346, with maximal V bright ness of 13.58m. MLCS analysis led to T0(B) = JD 2,452,346.1 ± 0.8 (fiducial B-maximum), E(B-V),= 0.24m ± 0.02m, μ0=32.46±0.06$, Δ=-0.14±0.04. E(B-V)=0.24m(2) indicates a significant extinction in the host galaxy as the galactic reddening is negligible toward NGC 3190. The accepted value of Δ indicates that SN 2002bo was a slightly overluminous SN by about 0.14m relative to fiducial SN type Ia. The distance turned out to be 31.0±3 Mpc. In addition, the heavily obscured SN 2002cv was also detected on the I frame taken on JD 2,452,434 (June 8, 2002), and a variable star is found in the field, very close to the host galaxy.