apparent magnitude


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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 ?
Below is a chart showing the apparent magnitudes of the 10 brightest stars (other than the sun) as seen from Earth.
As Reid develops the distinction, the real magnitude of an object (for example, the edge of a table) is an intrinsic property of it, measured in inches or feet, whereas the apparent magnitude of an object is a relation between the object and a perceiver, measured by the angle the object subtends at the eye.
The brilliant new star probably reached apparent magnitude -8 or -9, far outshining Venus and casting shadows.
The connection between colour perception and apparent magnitude is well illustrated by the following anecdote.
V is the apparent magnitude of a star, determined by photometry, in a standard wavelength band in the yellow-green region, chosen to correspond with that to which the human eye is most sensitive.
Frosty Leo is some 3000 light years distant and with apparent magnitude 10.
Once we know that, we can convert its apparent magnitude to its absolute magnitude (the magnitude it would appear to an observer at 10 parsecs, or 32.
This object is a flare star, though its brightness variations are only from about apparent magnitude 6.
COMPUTE IT YOURSELF Here are the formulas to find any object's actual size, and the apparent magnitude of any star, at any distance.
Kron had measured the apparent magnitude, color, and temperature .
M101 is one of the brightest galaxies in the sky, with a total apparent magnitude of 8, but its light is spread out over a huge area.