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For example, the giant elliptical galaxy M87 has an absolute magnitude of −22 (i.e. as bright as about 60,000 stars of magnitude −10). Some active galactic nuclei ( quasars like CTA-102 ) can reach absolute magnitudes in excess of −32, making them the most luminous persistent objects in the observable universe, although these objects can ...
Betelgeuse (apparent magnitude 0.5, absolute magnitude −5.8) appears slightly dimmer in the sky than Alpha Centauri A (apparent magnitude 0.0, absolute magnitude 4.4) even though it emits thousands of times more light, because Betelgeuse is much farther away.
For example, 3C 273 has an average apparent magnitude of 12.8 (when observing with a telescope), but an absolute magnitude of −26.7. If this object were 10 parsecs away from Earth it would appear nearly as bright in the sky as the Sun (apparent magnitude −26.744).
The absolute magnitude M, of a star or astronomical object is defined as the apparent magnitude it would have as seen from a distance of 10 parsecs (33 ly). The absolute magnitude of the Sun is 4.83 in the V band (visual), 4.68 in the Gaia satellite's G band (green) and 5.48 in the B band (blue).
Absolute magnitude (M V) +0. ... This is the first such detection of a magnetic field on a spectral class A star that is not an Ap chemically ... for example, to a ...
The apparent magnitude is the observed visible brightness from Earth which depends on the distance of the object. The absolute magnitude is the apparent magnitude at a distance of 10 pc (3.1 × 10 17 m), therefore the bolometric absolute magnitude is a logarithmic measure of the bolometric luminosity.
Absolute magnitude (M V) −0.2 [4] Details; ... it is the brightest star in the constellation and at magnitude 1.77 is the thirty-third brightest star in the sky.
It is suspected of being a semiregular variable star whose apparent visual magnitude varies from +2.01 to +2.10. [2] At this stage of the star's evolution, the outer envelope has expanded to around 86 times the size of the Sun. It is radiating 1,675 times the luminosity of the Sun at an effective temperature of 3,802 K. [5]