Membership, fundamental parameters and luminosity function of the open cluster NGC 5662

Abstract

New photoelectric UBV photometry of 237 stars brighter than V = 14.0 as well as DDO and Washington photometry of three red stars in the open cluster NGC 5662 are presented. Nearly one-third of the stars sampled are found to be members of the cluster based on photometric and astrometric indicators. NGC 5662 contains two red giants and two photometric variable stars. The reddening across the cluster is found to be variable, the mean value being |$E(B-V) = 0.31 \pm 0.04.$| A distance of (790 ± 55) pc, an age of |$7.9 \times {10}^{7}$| yr, a metal abundance of |$\left[ \text{Fe/H}\right] = - 0.03 \pm 0.13$| relative to the sun, and other fundamental parameters are also derived. On the basis of the improved cluster parameters derived here, it is concluded that the |${5}_{.}^\text{d}{5}$| Cepheid V Cen is almost certainly a member of NGC 5662.