absolute magnitude(redirected from Absolute brightness)
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absolute magnitude:see magnitudemagnitude,
in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the dimmest stars
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absolute magnitudeSee magnitude.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
absolute magnitude[′ab·sə‚lüt ′mag·nə·tüd]
A measure of the brightness of a star equal to the magnitude the star would have at a distance of 10 parsecs from the observer.
The stellar magnitude any meteor would have if placed in the observer's zenith at a height of 100 kilometers.
The absolute value of a number or quantity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.