Abstract:
Photoelectric UBV magnitudes and colours have been determined for stars in the filed of NGC 1931. The reddening across the cluster varies from 0. ͫ 33 to 1. ͫ 20. A distance of 2.16 kiloparsecs has been estimated fro the cluster. It is concluded that the age of the cluster lies between the ages of NGC 6231 and NGC 2362 groups.
