Original: Absolute magnitude then equals the apparent magnitude an object would have if it were at a standard luminosity distance ( 10 parsecs , 1 AU , or 100 km depending on object type ) away from the observer , in the absence of astronomical extinction .
Simplified: In astronomy , absolute magnitude is the apparent magnitude , m , an object would have if it were at a standard luminosity distance away from us , in the absence of interstellar extinction .