UBVRICT1T2 photometry of 7 open clusters

The multiband photometric data sets in combination with 2MASS photometry and Gaia astrometry for the brighter stars were used to estimate their structural parameters and fundamental astrophysical properties. We found that Ruprecht 3 and ESO 436-2 do not show self-consistent evidence of being physical systems.

The remained studied objects are open clusters of intermediate age (9.0<=log(t[yr^-1^])<=9.6), of relatively small size (r_cls_~0.4-1.3pc) and placed between 0.6 and 2.9kpc from the Sun. We analysed the relationships between core, half-mass, tidal and Jacoby radii as well as half-mass relaxation times to conclude that the studied clusters are in an evolved dynamical stage. The total cluster masses obtained by summing those of the observed cluster stars resulted to be ~10-15 per cent of the masses of open clusters of similar age located closer than 2kpc from the Sun.