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Magnitudes of stars

  1. Mar 10, 2008 #1
    Can anyone help me get my head around this one?
    A star with a parallax angle of pi = 10 millisecs and has apparant magnitude of V= 10.2
    How can I determine absolute magnitude:
    I have the formula M=v -5logd -5 +A which can be ignored.
    d=1/pi but I am always determining d which is less than that of the sun's distance!
    Thanks Red
  2. jcsd
  3. Mar 10, 2008 #2
    10 m'' = .010" , [tex]d=\frac{1}{p''}[/tex], where d is the distance in parsecs. Solve for d. This should probably be in the homework section.
    Last edited: Mar 10, 2008
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