Photometric and kinematical analysis of Koposov 12 and Koposov 43 open
  clusters
  We present a photometric and kinematical analysis of two and poorly studied
open clusters; Koposov 12 (FSR 802) and Koposov 43 (FSR 848) by using
cross-matched data from PPMXL and Gaia DR2 catalog. We use astrometric
parameters to identify 285 and 310 cluster members for Koposov 12 and Koposov
43, respectively. Using the extracted member candidates and isochrone fitting
to near-infrared (J, H, Ks) and Gaia DR2 bands (G, GBP, GRP), and Color
Magnitude Diagrams (CMDs), we have estimated ages: log (age/yr) = 9.00 +/- 0.20
and 9.50 +/- 0.20, and distances d = 1850 +/- 43 pc and 2500 +/- 50 pc for
Koposov 12 and Koposov 43, respectively, assuming Solar metallicity (Z=0.019).
The estimated masses of the cluster derived using initial mass function and
synthetic CMD are 364 +/- 19 M_sun and 352 +/- 19 M_sun. We have also computed
their velocity ellipsoid parameters based on (3x3) matrix elements (mu_ij).
