The intermediate age open cluster NGC 2660*

We present CCD UBVI photometry of the intermediate old open cluster NGC 266 0, covering from the red giant region to about seven magnitudes below the m ain sequence turn-off. Using the synthetic colour-magnitude diagram method, we estimate in a self-consistent way values for distance modulus [(m - M)( 0) similar or equal to 12.2], reddening [E(B - V) similar or equal to 0.40] , metallicity ([Fe/H] about solar) and age (tau less than or similar to 1 G yr). A 30 per cent population of binary stars turns out to be probably pres ent.