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
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
The brightest of the four is a hot A-type main-sequence dwarf with an apparent magnitude
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.