apparent magnitude

(redirected from Visible magnitude)
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Related to Visible magnitude: Stellar magnitude

apparent 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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apparent magnitude

See magnitude.

apparent magnitude

[ə′pa·rənt ′mag·nə‚tüd]
(astronomy)
An index of a star's brightness relative to that of the other stars; it does not take into account the difference in distance between the stars and is not an indication of the star's true luminosity.
References in periodicals archive ?
As for Lemma 1, Yaffe has shown how to construct angles in which (surprisingly) the real magnitude and the visible magnitude as seen from e are the same even though the line from e to the plane of the angle is not orthogonal.
(43) Essentially the same problem arises for the classical definition of the visible magnitude of a line as the angle it subtends at the eye: how are we to adapt this definition given that there are two eyes?
Yaffe shows at 617-18 how to find single angles in which real and visible magnitude are the same despite an oblique line of sight.
Yaffe's conjecture: If the visible magnitudes of angles in a figure f (as seen from e) are equal to the real magnitudes of angles in f, then f is a spherical figure.