Photometric and statistical comparisons of the old open cluster M67 (NGC 2682) using KFISP and Gaia EDR3 astrometry

Abstract

ABSTRACT We present the BV photometric observations of the open cluster M67 using the Kottamia Faint Imaging Spectro-Polarimeter (KFISP), mounted at the 74-inch telescope. We build three colour-magnitude diagrams of the Gaia EDR3 and the BV. We derived the photometric and astrometric parameters of the cluster. The mean parallax is 1.167 mas (distance is 857 ± 22 pc). The age and the reddening E(B-V) of the open cluster are 4.00 Gyr and 0.03 mag, respectively. We identified 434 members from the Gaia EDR3, with a probability >70%. The mean proper motion is obtained as mas/yr and mas/yr. We used statistical comparisons to test the quality of the observations taken from the KFISP. The statistical comparisons in the BV bands showed that there are no significant differences between observations and published catalogues.