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Sirius has a luminosity of: 25.4 while Rigel has a luminosity of: 66,000
Making Rigel brighter than Sirius.
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∙ 13y ago
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What star has a greater magnitude a Rigel or Sirius?
Sirius, which means that Rigel is brighter.
Does Rigel have greater apparent magnitude than Sirius?
No, which means that Rigel appears brighter.
Which is brighter Rigel or Betelgeuse?
Rigel is brighter.
Which star is brighter Betelgeuse or Rigel?
Rigel is brighter than Betelgeuse.
Even though this star has an absolute magnitude greater then that of sirius it looks dimmer from earth since it's 100 times farther away?
The apparent brightness of a star depends mainly on (1) its absolute (i.e., real) brightness, and (2) the square of its distance from us. The absolute magnitude of Sirius is +1.45, while that of Rigel is -6.95, meaning that Rigel is approximately 2,290 times as bright as Sirius. However, Rigel is approximately 100 times as far from us (870 light years versus 8.6 light years), which reduces its brightness relative to Sirius by a factor of over 10,000. This makes Sirius about 4.5 times brighter than Rigel for a difference of 1.62 magnitudes (-1.44 relative magnitude for Sirius versus +0.18 for Rigel).
What star has a greater magnitude a Rigel or Sirius?
Sirius, which means that Rigel is brighter.
Does Rigel have greater apparent magnitude than Sirius?
No, which means that Rigel appears brighter.
Which star has the less absolute magnitude rigel or Sirius?
Sirius has less absolute magnitude than Rigel. Sirius is smaller and less luminous than Rigel, but much closer to us, so Sirius appears brighter. Sirius, in fact, is the brightest star in our sky (with the exception of our own star, the sun.) Rigel is still pretty bright, but many times farther away from us than Sirius.
Which is brighter Rigel or Betelgeuse?
Rigel is brighter.
Which star is brighter Betelgeuse or Rigel?
Rigel is brighter than Betelgeuse.
What does rigel have brighter then Sirius?
I'm not sure exactly what detail you want, but here's a start. Rigel is a triple star system. The main star of the three is a very luminous star. It is a blue supergiant star.
Which star is bigger sirius or rigel?
Rigel is approximately ten times LARGER than Sirius
Even though this star has an absolute magnitude greater then that of sirius it looks dimmer from earth since it's 100 times farther away?
The apparent brightness of a star depends mainly on (1) its absolute (i.e., real) brightness, and (2) the square of its distance from us. The absolute magnitude of Sirius is +1.45, while that of Rigel is -6.95, meaning that Rigel is approximately 2,290 times as bright as Sirius. However, Rigel is approximately 100 times as far from us (870 light years versus 8.6 light years), which reduces its brightness relative to Sirius by a factor of over 10,000. This makes Sirius about 4.5 times brighter than Rigel for a difference of 1.62 magnitudes (-1.44 relative magnitude for Sirius versus +0.18 for Rigel).
Why does Rigel not look as bright as Sirius?
Because Rigel is much farther away. Rigel is 770 light-years away, and Sirius is only 8.6 light-years away.
Is Rigel brighter or dimmer?
Rigel is one of the brightest stars in the sky.
Does rigel have a greater magnitude than sirus?
No, which means that Rigel is brighter.
What star is brighter Betelgeuse or Rigel?
Betelgeuse has an apparent magnitude of 0.42(v) and an absolute magnitude of -6.02. Rigel has an apparent magnitude of 0.12 and an absolute magnitude of -7.04. So Rigel is brighter.
