Flux VersionEdit

The absolute magnitude of an object is the apparent magnitude the object would have if it were 10 parsecs away.

$ m _{abs} - m _{vega,abs} = -2.5log_{10}(\frac {F _{abs}}{F _{vega,abs}}) $

  • $ F _{abs} $ is the actual flux coming from the object

Absolute flux is defined as:

$ F _{abs} = \frac {L}{4 \pi ({10pc})^2} $

Luminosity VersionEdit

The apparent magnitude with respect to the object's luminosity is given by

$ m _{abs} - m _{abs,vega} = -2.5log_{10}(\frac {L _{obj}}{L _{vega}}) $