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What is the difference in magnitudes?

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Pogson defined a difference of 5 magnitudes to be exactly equal to a hundredfold change in brightness, so that stars differing by 1 magnitude differ in brightness by a factor of 2.512 (the 5th root of 100).

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Get more facts and information about magnitude . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

Similar questions: What is the brightness factor difference between magnitudes? How much brighter is one magnitude over the next? [ Hide these questions ]

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