The ratio of brightness of two stars can be determined by a constant of 2.512 raised to the power of the magnitude difference.  The formula   b1   b2  = 2.512 (m2 − m1)  where b1 and b2 represent the brightness and m1 and m2 refer to the magnitudes of the stars being compared.  One star  has a magnitude of 0.6, and another star has a magnitude of 2.6.

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