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The absolute magnitude is the magnitude (brightness) an object would have at a standard distance - how bright would it look at a standard distance. For a star or galaxy, the standard distance of 10 parsecs is commonly used.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoYou look at the color of the light of the star and the "fraunhofer lines" which are teltale signs of the star's composition. You compare with theoretical models and other known stars of similar make-up, you thereby can know how bright it really shines (it's absolute magnitude)
Wiki User
∙ 12y agoM = m - 5 ((log10 DL) - 1)
- M = absolute magnitude,
- m = apparent magnitude.
- DL = Distance
For very large distances, redshift complicates might require a correction.
Wiki User
∙ 13y agoIn astronomy, absolute magnitude measures a celestial object's intrinsic brightness as if all where viewed from the same distance. This distance is set at 1 AU for our Solar System. For greater distance's, galaxies etc. the value is 32.616 light years.
So our Sun has an Apparent magnitude (As viewed from Earth) of -26.74 (Negative values are the brightest) but it has an absolute magnitude of +4.83. Sirius for comparison has an absolute magnitude of +1.42 so would appear brighter if viewed from the same distance.
Wiki User
∙ 13y agoYou can't because you don't have enough information. The difference between the star's
absolute magnitude and apparent magnitude depends on its distance from earth.
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Explain why size is the only factor that determines the stars absolute magnitude?
The absolute magnitude is a measure of the star's luminosity hence the smaller the size the less the absolute magnitude.
Which measure is not considered when measuring absolute magnitude?
distance from earth
What is Porrima's absolute magnitude?
The absolute magnitude of Porrima is 3.04.
What is the absolute magnitude of POLARIS?
-3.64 is the absolute magnitude of Polaris.
What is the absolute magnitude of VY Canis Majoris?
VY Canis Majoris has an absolute magnitude of -9.4.
Explain why size is the only factor that determines the stars absolute magnitude?
The absolute magnitude is a measure of the star's luminosity hence the smaller the size the less the absolute magnitude.
What is apparent and absolute magnitude?
Apparent magnitude is the measure of how bright a star appears to be from our vantage point. Absolute magnitude is the measure of how bright a star would be if it were located 10 parsecs from earth.
How are absolute magnitude and apparent magnitude alike?
Absolute magnitude and apparent magnitude are the same because they are both ways on how to measure the brightness of a star. Absolute magnitude is how bright is the star if we will see it in a 32.616 light-years distance while apparent magnitude is the brightness of it that we see on Earth.
Which measure is not considered when measuring absolute magnitude?
distance from earth
What ways can you measure th distance to nearby stars?
You can measure it by using absolute magnitude.
What is the Antares absolute magnitude and its apparent magnitude?
Antares Absolute and Apparent Magnitude Absolute Magnitude~ -5.2 Apparent Magnitude~ +0.60
What is a sentence for Absulute Magnitude?
Meaning:A measure of how bright a star would be if it were seen from a standard distance.Sentence:The sun's Absolute Magnitude is 4.8.
Does the absolute magnitude of the sun show that it is the brightest star?
No. The sun has an absolute magnitude of 4.83. By comparison, Betelgeuse has an absolute magnitude of -5.85. Lower numbers indicate a brighter star. In this case Betelgeuse is actually several thousand times brighter than the sun. The sun is the brightest star as measure by apparent magnitude, which is how bright a star looks from a given location and depends on both absolute magnitude and distance.
What is absolute magnitude of Rigel?
Its absolute magnitude is -7.92
What is Porrima's absolute magnitude?
The absolute magnitude of Porrima is 3.04.
What is the absolute magnitude of Betelgeuse?
The absolute magnitude of Betelgeuse is -6.05
What can be said about the absolute magnitude of two equal-sized stars whos colors are blue-voilet and orange-red?
Absolute magnitude refers to a measure of the real brightness of a star. In terms of absolute magnitude, a blue-violet star is classified as bright, while an orange-red star is classified as faint.
