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:<math>2,512^{\Delta{m}} = \Delta{L}</math>
RelativeYorqinligi tova bothYerdan luminosity and distance fromuzoqligiga Earthqarab, absoluteabsolut magnitudekattalik (''M'') andkoʻrinma apparent magnitudekattalikka (''m'') areekvivalent not equivalent for an individual staremas;<ref name="luminosity" /> for examplemasalan, the bright star Sirius has an apparentkoʻrinma magnitudeyulduz ofkattaligi −1.,44 ga, butabsolut ityulduz haskattaligi an absolute magnitude ofesa +1.,41 ga teng.
Quyoshning koʻrinma yulduz kattaligi −26,7, biroq absolut yulduz kattaligi esa atigi +4,83. Sirius, tungi osmondagi eng porloq yulduz, Quyoshdan taxminan 23 marta yorqinroq boʻlsa, tungi osmonda ikkinchi eng porloq [[Kanopus]] yulduzi (absolut kattaligi -5,33) Quyoshdan 14 000 ming marta yorqinroqdir. Kanopus Siriusga nisbatan juda yorqinroq, lekin Sirius Yer uchun porloqroq koʻrinadi. Sababi Sirius Yerda 8,6 yorugʻlik yili uzoqlikda, Kanopus esa ancha uzoqroq joylashgan - ungacha masofa 310 yorugʻlik yilidir.
The Sun has an apparent magnitude of −26.7, but its absolute magnitude is only +4.83. Sirius, the brightest star in the night sky as seen from Earth, is approximately 23 times more luminous than the Sun, while [[Canopus]], the second brightest star in the night sky with an absolute magnitude of −5.53, is approximately 14,000 times more luminous than the Sun. Despite Canopus being vastly more luminous than Sirius, however, Sirius appears brighter than Canopus. This is because Sirius is merely 8.6 light-years from the Earth, while Canopus is much farther away at a distance of 310 light-years.
As of 2006, the star with the highest known absolute magnitude is [[LBV 1806-20]], with a magnitude of −14.2. This star is at least 5,000,000 times more luminous than the Sun.<ref>{{cite web
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