Photometric study of the open cluster NGC 381

Abstract

We present UBVRcIc photometry of stars, down to the 20th magnitude, in the region of the intermediate- age open cluster NGC 381. The core and the cluster radii are estimated to be 2.99 +/- 0.93 and 5.6 +/- 0.1 arcmin, respectively. A total of 350 probable cluster member stars are identified by using proper motion from GAIA as the criterion of membership. The mean proper motion of the cluster is μ_x = 1.55 +/- 0.38 mas yr-1, μ_y = -2.19 +/- 0.39 mas yr-1. We notice an anomalous reddening as the optical total-to-selective extinction ratio in the direction of the cluster Rcluster = 3.7 +/- 0.1. The reddening E(B-V) = 0.35 +/- 0.04 mag is found in the direction of the cluster NGC 381. The distance to the cluster is 957 +/- 93 pc and the cluster has an estimated age of log(Age)= 8.50 +/- 0.05 years.