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Magnitude. The degree of brightness of a star or other object in the sky according to a scale on which the brightest star has a magnitude -1.4 and the faintest visible star has magnitude 6. Sometimes referred to as apparent magnitude. In this scale, each number is 2.5 times the brightness of the previous number. Thus a star with a magnitude of 1 is 100 times brighter than on with a visual magnitude of 6.
Absolute magnitude is a measure of the inherent brightness of a celestial. object. This scale is defined as the apparent magnitude a star would. have if it were seen from a distance of 32.6 light-years. The lower the. number, the brighter the object. Negative numbers indicate extreme. brightness.