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Homework Help: Apparent magnitude of a binary star system

  1. Dec 3, 2011 #1
    1. The problem statement, all variables and given/known data
    A binary star system consists of a hot main sequence star (m=0.5m) and a red giant (m=1.2m), the parallax of the system is p=0.0012". Calculate the apparent magnitude of the system.

    2. Relevant equations
    I have b1/b2 = 2.512^(m2-m1) and p=1/r

    3. The attempt at a solution
    I've already calculated the distance from the system to the earth (~833.65pc) and I know that I can't simply add the apparent magnitudes.
  2. jcsd
  3. Dec 3, 2011 #2
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