A comprehensive photometric and kinematical characteristic of the newly
  discovered QCs clusters with Gaia EDR3
  This study reports the first comprehensive astrometric, photometric and
kinematical analysis of four newly discovered open clusters; namely QC1, QC2,
QC3, and QC4, using astrometric and photometric data from the most recent Gaia
EDR3 for G<17 mag. Utilizing the ASteCA code, we identified the most probable
(P>=50%) star candidates and found the numbers of star members (N) to be 118
(QC1), 142(QC2), 210 (QC3), and 110 (QC4). By fitting King's density profile to
the cluster's RDPs, we found the internal structural parameters of each cluster
such as the cluster radii that are in the range 7.00 to 11.00arcmin. For each
cluster we constructed the CMD and by fitting them with suitable isochrones we
found that the metallicity range is (0.0152-0.0199) which is in line with the
Solar value, the logarithmic age (in yrs) range between 6.987 and 8.858. The
distances derived from CMD are 1674+/-41, 1927+/-44, 1889+/-43,and 1611+/-40
(pc) for QC1, QC2, QC3, and QC4, respectively, and they are in good agreement
up to 85% with the values obtained from the astrometric data. In addition, from
the MLR of the clusters, we obtained a total mass, M_C in Solar units, of 158,
177, 232, and 182 and an absolute magnitude MG(mag)of 4.33, 3.80, 4.25, and
4.10 for QC1, QC2, QC3, and QC4, respectively. The dynamical analysis and
evolution parameters of the cluster members indicated that all the four
clusters are dynamically relaxed;except QC1 which has an evolution parameter
tau=0.82 that indicates a dynamical activity within the cluster. From the
kinematical analysis of the cluster data, we computed the space velocity, the
coordinates of the apex point (A,D) using the AD-diagram method, as well as the
Solar elements (S_sun, l_A, b_A,alpha_A,delta_A)
