Photometric Study of the Open Cluster NGC 225

Abstract

—NGC 225 is a young moderately populated cluster with discrepant age, distance, and color excess estimates reported by different authors. We combine our photometry with the data from large surveys (2MASS, WISE, Pan-STARRS) to derive the parameters of NGC 225 and study the extinction law in the near infrared in the direction of the cluster. We use theoretical isochrones to infer the color excess $$E(B - V) = 0.29 \pm 0.01$$, distance $$D = 667 \pm 18$$ pc, and Age = $$100$$–$$160$$ Myr. We fit extinction in the infrared by a power-law relation, $${{\lambda }^{{ - \alpha }}}$$, and find $$\alpha = 2.16 \pm 0.34$$.