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Absolute Visual Magnitude

Astronomy  Absolute temperature scale  Absolute zero
04/24/2014

Absolute Visual Magnitude
Intrinsic brightness of a star; the apparent visual magnitude the star would have if it were 10 Parsecs away from earth.
Absolute Zero ...


Our Sun has an absolute visual magnitude of 4.8.
Finding the Distance to Stars - Distance Modulus ...

In astronomy, absolute magnitude (also known as absolute visual magnitude when measured in the standard V phometric band) measures a celestial object's intrinsic brightness.

Sirius A has an absolute visual magnitude of 1.42 and Sirius B, 11.18. The age of the star system is estimated to be between 200 and 300 million years.

heat index The difference between the absolute visual magnitude of a star and the absolute radiometric magnitude (Mv - Mr).

To compare true visual luminosities, astronomers calculate the absolute visual magnitude (M), the apparent magnitude the star would have were it at a distance of 32.

Normally one must state the frequency range over which the measurement is made. The Sun has an absolute visual magnitude of 4.83, and the brightest star in the sky, Sirius, has an absolute visual magnitude of 1.4 and an apparent magnitude of -4.6.

Its integrated absolute visual magnitude has been estimated to be '20.9.

For the M95 distance modulus (30 mag), this corresponds to an absolute visual magnitude of -3 mag.

38,000 times brighter than the sun. Absolute visual magnitude, Mv =-6.7
Where to View:
Located in the constellation of Cepheus (Star Map) ...

This table shows the apparent and absolute visual magnitudes of some stars and their distances:
StarmvMvd (pc)
Sun
-26.8 ...

Facts and figures about the 25 brightest stars, including apparent and absolute visual magnitude, distance and spectral type.
The 30 closest stars ...

Classical ellipticals (E galaxies), with their bright compact nuclei and steep brightness gradients, range from absolute visual magnitude MV ~ -23 down to MV ~ -16 mag.

Sirius A is about twice as massive as the Sun and has an absolute visual magnitude of 1.42. It is 25 times more luminous than the Sun but has a significantly lower luminosity than other bright stars such as Canopus or Rigel.

034 magnitudes, and an absolute visual magnitude of 17.47 +/- 0.04 (A.O. abstract) -- "in excellent agreement with those of the U.S Naval Observatory (Conrad Dahn, private communications." Useful catalogue numbers for this star include: SO025300.

See also: See also: Star, Visual magnitude, Magnitude, Sky, Sun

Astronomy  Absolute temperature scale  Absolute zero
04/24/2014

 
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