THE OPEN CLUSTER NGC 3293 AND THE OB COMPLEX IN CARINA

Photoelectric measures in UBVRI of 46 stars in and around the open cluster NGC 3293 are presented. A distance modulus of Vo — Mv = 12.1 ± 0.15 (s.d.), corresponding to 2.6 kpc, was derived from the photometric data for 34 member stars. This is similar to distances found for other young groups in the Carina region. One M supergiant and one Be star are members of the cluster. The brightest stars on the main sequence are of type B1. Several stars that have evolved away from the upper main sequence have been classified as giants and supergiants. The age of the cluster is about 7 x 10⁶ years. The star HD 91824 (no. 1), spectral type O7 V((f)), is not a member of the group. The interstellar reddening is normal in front of this cluster.