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Homework Statement
If a star has an apparent magnitude of -.4 and a parallax of .3'' what is :
a) the distance modulus
b) the absolute magnitude
Homework Equations
m is the apparent magnitude and M is the absolute magnitude
m-M =5 log d - 5
M= m + 5+5 log(pi''), pi'' is the parallex angle
The Attempt at a Solution
In order to find the Absolute magnitude, M, I apply the equation M= m + 5 + 5log(pi'')
I can easily find M since m and pi'' are already given in the problem. The only trouble I'm having is I don't know what units of measurement I'm supposed to convert pi'' to or if I'm suppose to leave pi'' the way it is.
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