Open star cluster: formation, parameters, membership and importance
  We have been represented the collective information of estimation procedures
of parameters of the open clusters and put them together for showing the
importance of clusters to understand their role in stellar evolution
phenomenon. Moreover, we have been discussed about analytic techniques to
determine the structural and dynamical properties of galactic clusters. The
members of clusters provide unique opportunity to determine their basic
parameters such as: age, metallicity, distance, reddening etc. The membership
probabilities of stars of clusters is assigned through the various approaches
and each approach provides different number of probable members of the cluster.
Here, we have been briefly discussed about various approaches to determine the
stellar membership within clusters.
