JH photometry of Berkeley 59

The J/(J-H) colour-magnitude diagram of the cluster yields a distance modulus of (m-M)_0_=10.0+/-0.2mag, which corresponds to a distance of 1.0+/-0.1kpc. Using the slitless spectroscopy we identified 9 H{alpha} emission line stars in the observed region.

The location of H{alpha} stars in the CMD indicates that they may be pre-main sequence stars. We have estimated the age of the cluster using the turn-off and turn-on points and is found to lie between ~1Myr to 4Myr. Two massive stars (~25M_{sun}_) in the cluster region have high membership probability which indicates that the low mass stars (~0.8M_{sun}_) may co-exist with massive stars.