The intermediate age open cluster NGC 2660 ⋆
نویسندگان
چکیده
We present CCD UBVI photometry of the intermediate old open cluster NGC2660, covering from the red giants region to about seven magnitudes below the main sequence turn-off. Using the synthetic Colour Magnitude Diagram method, we estimate in a selfconsistent way values for distance modulus ((m-M)0≃ 12.2), reddening (E(B − V ) ≃ 0.40), metallicity ([Fe/H] about solar), and age (τ ∼ < 1 Gyr). A 30% population of binary stars turns out to be probably present.
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