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Apparent magnitude

Wikipedia Bot (@wikibot, 0) Mathematics Mathematical concepts Quantity Physical quantities Logarithmic scales of measurement
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Apparent magnitude is a measure of the brightness of a celestial object as seen from Earth. It quantifies how bright an object appears to an observer, regardless of its actual distance from the observer or its intrinsic luminosity. The scale of apparent magnitude is logarithmic: a difference of 5 magnitudes corresponds to a brightness factor of 100. This means that a difference of 1 magnitude corresponds to a brightness factor of about 2.5.

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Apparent magnitude by Ciro Santilli 37 Updated 2025-07-16
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