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- absolute magnitudesearch for term
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The apparent magnitudeThe apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth. The brighter the object appears, the lower the value of its magnitude. an object would have if it were located at a distance of 10 parsecsThe distance at which 1 AU subtends and angle of 1 arcsec. Approximately 3.26 light years.. This is a measure of the intrinsic brightness of a celestial object.