Abstract
We present the UBVRI CCD photometry in the region of the open cluster NGC 2421. The radius of the cluster is determined as ∼3.0 arcmin using a stellar density profile. Our study indicates that the metallicity of the cluster is Z ∼ 0.004. The reddening E(B - V) = 0.42 ± 0.05 mag is determined using a two colour (U - B) versus (B - V) diagram. By combining the 2MASS JHK data with the optical data, we determined that E(J - K) = 0.20 ± 0.20 mag and E(V - K) = 1.15 ± 0.20 mag for this cluster. Colour-excess diagrams show a normal interstellar extinction law in the direction of the cluster. We determined that the distance of the cluster is 2.2 ± 0.2 kpc by comparing the zero-age main sequence with the intrinsic colour-magnitude diagram of the cluster. The age of the cluster has been estimated as 80 ± 20 Myr using the stellar isochrones of metallicity Z = 0.004. The mass function slope x = 1.2 ± 0.3 has been derived by applying the corrections of field star contamination and data incompleteness. Our analyses indicate that the cluster NGC 2421 is dynamically relaxed.
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