2MASS photometry and kinematical studies of open cluster NGC 188
  In this paper, we present our results for the photometric and kinematical
studies of old open cluster NGC 188. We determined various astrophysical
parameters like limited radius, core and tidal radii, distance, luminosity and
mass functions, total mass, relaxation time etc. for the cluster using 2MASS
catalog. We obtained the cluster's distance from the Sun as 1721+/-41 pc and
log (age)= 9.85+/-0.05 at Solar metallicity. The relaxation time of the cluster
is smaller than the estimated cluster age which suggests that the cluster is
dynamically relaxed. Our results agree with the values mentioned in the
literature. We also determined the cluster's apex coordinates as (281.88 deg,
-44.76 deg) using AD-diagram method. Other kinematical parameters like space
velocity components, cluster center and elements of Solar motion etc. have also
been computed.
