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We derive astrophysical and structural parameters of the poorly studied openclusters NGC 6866, NGC 7062, and NGC 2360 based on filtered 2MASS (J, J -H)diagrams, and stellar radial density profiles. The field star decontaminationtechnique is utilised for selecting high-probability cluster members. The E(B-V) reddening values of the three clusters derived from 2MASS JHKs agree withthose inferred from UBV and uvby-{\beta} photometries. We find that the coremass function slopes are flatter than the halo's for the three clusters. Thelarge core and cluster radii of NGC 6866 and NGC 2360 indicate an expandedcore, which may suggest the presence of stellar mass black-holes. NGC 2360 islocated in the third quadrant (l = 229.80), where Giant Molecular Clouds arescarce that, together with its relatively large mass (~ 1800 msun), mightexplain its longevity(~ 1.8Gyr) in the Galaxy.

Astrophysical and Structural Parameters of the Open Clusters NGC 6866, NGC 7062, and NGC 2360