Abstract
We present CCD UBVI photometry of the intermediate old open cluster NGC 2660, covering from the red giant region to about seven magnitudes below the main sequence turn-off. Using the synthetic colour-magnitude diagram method, we estimate in a self-consistent way values for distance modulus [(m−Ṁ0≃12.2], reddening [E(B−V)≃0.40], metallicity ([Fe/H] about solar) and age (τ≲1 Gyr). A 30 per cent population of binary stars turns out to be probably present.
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