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How many times brighter is a cepheid variable of absolute magniture -3 than a white dwarf of absolute magnitude of 7?
Wiki User
∙ 9y ago
That is a difference of ten magitudes so the factor in brightness is 10,000.
Wiki User
∙ 9y ago
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What is the apparrent magnitude of the star Betelguese?
The apparent magnitude of Betegeuse is 0.5 and it has an M2 spectrum making it a red star. Its distance is 420 light years and its absolute magnitude is -4.5 so it is 9 magnitudes brighter than the Sun; that is 4000 times brighter, so it's a giant. It is slightly variable in its brightness. At the same distance the Sun would be a 9th magnitude star, invisible except in a telescope.
Which stars always have large positive absolute magnitude?
Does it mean that the star is a main sequesnce star? ( . Y . ) The above isn't true. A star can be a blue supergiant and be on the main sequence but still not be even visible to us, therefore the apparent and absolute magnitude wouldn't be the same. But to answer your question, I don't think it has a name, it just means that you are seeing the star's absolute and apparent magnitude at the same time, so if you placed the star at 32.6 light years away(the absolute magnitude scale)then the star would not appear to change in brightness
What is the apparrent magnitude of the star 'Arcturus'?
Arcturus has an Apparent magnitude (visual magnitude) of −0.04, but note it is a variable star.
What is the brightness of castor?
Castor is the second brightest star in the constellation Gemini and one of the brightest stars in the nighttime sky.It is a variable star and has an apparent magnitude of 1.96 / 2.91 and an absolute magnitude of 1.33 /2.28.See related links and questions for more information.
What is the brightness of Betelgeuse?
Betelgeuse is a semiregular variable star located in the constellation Orion.It is the second brightest star in the constellation and the ninth brightest star in the night sky.It has an apparent magnitude of 0.58 (Var 0.3 -> 1.2) and an absolute magnitude of -5.14.See related link for more information.
What is the apparrent magnitude of the star Betelguese?
The apparent magnitude of Betegeuse is 0.5 and it has an M2 spectrum making it a red star. Its distance is 420 light years and its absolute magnitude is -4.5 so it is 9 magnitudes brighter than the Sun; that is 4000 times brighter, so it's a giant. It is slightly variable in its brightness. At the same distance the Sun would be a 9th magnitude star, invisible except in a telescope.
What is the absolute magnitude of mira?
I've found one estimate of the absolute magnitude of Mira: 0.93. However, Mira is a variable star, so perhaps that's an average value. Also, the distance to Mira is not known precisely, so any value for absolute magnitude can only be approximate.
What is the magnitude of Hadar?
Beta Centauri (Hadar or Agena) is the second brightest star in the constellation Centaurus.It has an apparent magnitude of 0.6 -> 0.8 (It's a variable star) or an absolute magnitude of -4.57
Which stars always have large positive absolute magnitude?
Does it mean that the star is a main sequesnce star? ( . Y . ) The above isn't true. A star can be a blue supergiant and be on the main sequence but still not be even visible to us, therefore the apparent and absolute magnitude wouldn't be the same. But to answer your question, I don't think it has a name, it just means that you are seeing the star's absolute and apparent magnitude at the same time, so if you placed the star at 32.6 light years away(the absolute magnitude scale)then the star would not appear to change in brightness
What variable of apparent brightness is eliminated when discussing absolute brightness?
Distance. "Absolute magnitudes" are all calculated as if viewed from the same distance, while "apparent magnitude" is how bright the star appears to be as seen from Earth.
What star has an absolute magnitude greater then the star Sirius?
Lots of stars have absolute magnitudes greater than Sirius. Sirius is the brightest star in the night sky, but that's mostly because it's fairly close. The SECOND brightest star in the night sky, Canopus, is intrinsically much brighter, but is over thirty times further away. Rigel, the sixth brightest star in the night sky, is even brighter than Canopus, but is more than twice as far away. Deneb and Aludra are brighter yet, but even further away.The most luminous star visible to the naked eye is Eta Carinae, but since it's over 7000 light years away, it's not especially bright visually (it's a variable, and can get as bright as first magnitude, but is currently about 4th or 5th magnitude).
What is the apparrent magnitude of the star 'Arcturus'?
Arcturus has an Apparent magnitude (visual magnitude) of −0.04, but note it is a variable star.
Is stars shining an example of s continuous variable?
No, it is a continuous process but not a continuous variable. The magnitude of star-shine, across all stars is a continuous variable. The magnitude of a star's shine over time is a continuous variable.
What is the brightness of castor?
Castor is the second brightest star in the constellation Gemini and one of the brightest stars in the nighttime sky.It is a variable star and has an apparent magnitude of 1.96 / 2.91 and an absolute magnitude of 1.33 /2.28.See related links and questions for more information.
What is the apparent magnitude of the star polaris?
Its apparent magnitude is about 2, but it's slightly variable. Usually it's given as 1.97v (where v means variable).
What is the brightness of Betelgeuse?
Betelgeuse is a semiregular variable star located in the constellation Orion.It is the second brightest star in the constellation and the ninth brightest star in the night sky.It has an apparent magnitude of 0.58 (Var 0.3 -> 1.2) and an absolute magnitude of -5.14.See related link for more information.
Work done by a variable force?
A variable force is that force whose magnitude, direction both change as it acts.
