 Relative to both luminosity and distance from Earth , a star 's absolute magnitude ( M ) and apparent magnitude ( m ) are not equivalent ; for example , the bright star Sirius has an apparent magnitude of − 1 @.@ 44 , but it has an absolute magnitude of + 1 @.@ 41 . 
 Relative to both luminosity and distance from Earth , a star <a href='null_genetive' title='1'><mark>'s</mark></a>absolute magnitude ( M ) and apparent magnitude ( m ) <a href='negative_concord' title='2'><mark>are</mark></a> <a href='negative_concord' title='3'><mark>not</mark></a>equivalent ; for example , the bright star Sirius <a href='got' title='4'><mark>has</mark></a> an apparent magnitude of − 1 @.@ 44 , but it <a href='got' title='5'><mark>has</mark></a> an absolute magnitude of + 1 @.@ 41 . 
Relative to both luminosity and distance from Earth , a star  absolute magnitude ( M ) and apparent magnitude ( m ) ain't equivalent ; fa example , the bright star Sirius got an apparent magnitude of − 1 @.@ 44 , but it got an absolute magnitude of + 1 @.@ 41 .