The intermediate-age open cluster NGC 2158

The intermediate age open cluster NGC 2660 ⋆

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...

NGC 1245 - an intermediate age open cluster

The B,V CCD photometry of 916 stars in the field of the high galactic latitude intermediate age open cluster NGC 1245 is presented. The cluster parameters were estimated with the help of V vs (B−V) colour magnitude diagram (CMD). After correcting for intra-cluster reddening, the mean redding towards the cluster was found to be 0.29±0.05 mag, with a distance modulus (m−M)0 equal to 12.4±0.3 mag....

UBVI photometry of the intermediate age open cluster NGC 6939

We present CCD UBV I photometry of the nearby, intermediate age open cluster NGC 6939. Using the synthetic Colour Magnitude Diagrams technique we estimate the following parameters: age between 1.3 and 1.0 Gyr (depending on whether or not overshooting is considered), reddening 0.34 ≤ E(B−V ) ≤ 0.38 and distance modulus 11.3 ≤ (m − M)0≤ 11.4.

Intermediate-Band Photometry in the Open Cluster NGC 6664

Four-color and HP photometry is given for early-type stars in the open cluster NGC 6664. From these data the true distance modulus is found to be 10.7 and the reddening is found to range from E (b y) = 0.48 to 0.63 across the cluster. The distance modulus agrees well with some values from the literature, but the present color excesses are about 0.1 mag larger than published values. There are tw...

Intermediate-Band Photometry of the Open Cluster NGC 3114