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- DictionaryAp·par·ent mag·ni·tude/əˈperənt ˈmaɡnəˌto͞od/
noun
- 1. the magnitude of a celestial object as it is actually measured from the earth.
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noun
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Apparent magnitude is a measure of the brightness of a star or other astronomical object. An object's apparent magnitude depends on its intrinsic luminosity, its distance, and any extinction of the object's light caused by interstellar dust along the line of sight to the observer. Wikipedia