which is magnitude 1 in the V filter, and magnitude 2 in the B filter, is fainter in the blue and so is a redder star.
For example, a star which is magnitude 1 in the V filter, and magnitude 2 in the B filter, is fainter in the blue and so is a redder star. It has a B-V of 2-1=+1. So the larger the B-V value is, the more red it is, and the more negative it is, the […]