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- Apparent magnitude (or brightness) depends on the location of the observer. Different observers will come up with a different measurement, depending on their locations and distance from the star. Stars or objects that are closer to Earth, but fainter, could appear brighter than far more luminous ones that are far away.
www.space.com/21640-star-luminosity-and-magnitude.html
Oct 11, 2017 · Astronomers define star brightness in terms of apparent magnitude — how bright the star appears from Earth — and absolute magnitude — how bright the star appears at a standard distance of 32.6...
How can we calculate the absolute magnitude of a star? There are two general ways. One method is to determine the distance to the star, measure the apparent magnitude, and scale the apparent magnitude to a distance of 10 pc.
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).
Apparent Magnitude (v)ObjectSeen From...−67.57gamma-ray burst GRB 080319Bseen from 1 AU away−43.27seen from 1 AU away−41.82star NGC 2363-V1seen from 1 AU away−41.39seen from 1 AU awayJul 9, 2024 · The brightness, or apparent magnitude, of a star depends on two main factors: the luminosity of the star. the distance the star is from Earth (more distant stars are usually fainter than nearby stars) Apparent magnitude is defined as. The perceived brightness of a star as seen from Earth.
Apr 11, 2022 · The apparent brightness of a star depends on both its luminosity and its distance from Earth. Thus, the determination of apparent brightness and measurement of the distance to a star provide enough information to calculate its luminosity.
Formulas: The magnitude scale expresses a given ratio of brightness (say, between two stars) as a difference in magnitudes.
Mar 24, 2018 · We have seen how a star’s brightness is noted to give its apparent magnitude and if we know its distance we can also calculate its absolute magnitude. From this we can get meaningful comparisons of the differences in the true brightness of the stars in the sky.
