  We have investigated the area of two NGC entries, NGC 1817 and NGC 1807, with
deep CCD photometry in the uvby-Hbeta intermediate-band system. The photometric
analysis of a selected sample of stars of the open cluster NGC 1817 yields a
reddening value of E(b-y)= 0.19$\pm$0.05, a distance modulus of V0-MV=
10.9$\pm$0.6, a metallicity of [Fe/H]= -0.34$\pm$0.26 and an age of log t =
9.05$\pm$0.05. Our measurements allow us to confirm that NGC 1807 is not a
physical cluster.
