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It is a red giant, 22 million miles in diameter or 35.7 million Kilometers. which is 25.7 times that of the sun and 2/3 the radius of of Mercury's orbit! The difference in size between our Sun and Arcturus would be, if the sun were the size of a BB, Arcturus would be larger than a soft ball about 4.5" or 113mm. Arcturus puts out more than 110 times as much light as the sun and is 36 light years away which is rather close, making it the third brightest star in the sky.
As large as it is there are stars far larger! The largest known star is Pistol. If Arcturus were a BB then Pistol would be a soccer ball and the sun would be a grain of sand! Pistol puts out an unbelievable 10 million times the light of the sun! It is very dim to us because it is 25,000 light years away and is in a cloud of nebula dust. Our sun would not be visible at all at that distance.
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∙ 14y ago
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∙ 14y agoThe visual apparent magnitude of Arcturus is -0.05.
The visual apparent magnitude of Arcturus is -0.05.
The visual apparent magnitude of Arcturus is -0.05.
The visual apparent magnitude of Arcturus is -0.05.
Wiki User
∙ 11y agoAlpha Centauri (Rigil Kentaurus, Rigil Kent, or Toliman) is the brightest star in the southern constellation of Centaurus.
It is actually a binary star, but appears to us as a single star.
- Alpha Centauri A has an absolute magnitude of +4.48
- Alpha Centauri B has an absolute magnitude of +5.71
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∙ 11y agoIt would take 36.7 light years to get to Arcturus from Earth. A light year is a unit of length just like an inch, mile or meter. Nevertheless, a very large unit. It's the distance light would travel in a year, which is about 9,460,730,472,600 km.
Wiki User
∙ 12y agoArcturus has an absolute magnitude of −0.30 (note the minus sign)
See related question about absolute magnitude.
Wiki User
∙ 15y agoThe gentle orange glow of Arcturus is of visual magnitude -0.05 or so. A link can be found below.
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∙ 14y agoRegulus (Alpha Leonis) is the brightest star in the constellation Leo.
It has an absolute magnitude of -0.52
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∙ 12y agoThe luminosity of this star is 170 times the solar luminosity .
Arcturus star is the brightest star in the constellation Bootes and fourth brightest star in he night sky .
Wiki User
∙ 13y ago15.49. Proxima Centauri is a red dwarf, and therefore rather dim.
Wiki User
∙ 14y agoThe visual apparent magnitude of Arcturus is -0.05.
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What is absolute magnitude of Rigel?
Its absolute magnitude is -7.92
What is the absolute magnitude of Betelgeuse?
The absolute magnitude of Betelgeuse is -6.05
What is the absolute magnitude of cassiopeia?
Cassiopeia absolute magnitude is 2.20 to 2.23
What is the suns absolute magnitude from earth?
You cannot ask for an absolute magnitude and specify the distance, as the absolute magnitude is derived from a set distance of 32.616 light years.At that distance, the absolute magnitude of the Sun is +4.83From Earth the apparent magnitude -26.74
Are absolute magnitude and apprent magnitude the same thing?
No. Apparent Magnitude is what it looks to be, whereas absolute is its actual mangnitude.
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 second brightest star?
The second brightest star is Canopus with an apparent magnitude of -0.72The brightest is Sirius with an apparent magnitude of -1.47
What is absolute magnitude of Rigel?
Its absolute magnitude is -7.92
What is the absolute magnitude of Betelgeuse?
The absolute magnitude of Betelgeuse is -6.05
What is Porrima's absolute magnitude?
The absolute magnitude of Porrima is 3.04.
What is the absolute magnitude of cassiopeia?
Cassiopeia absolute magnitude is 2.20 to 2.23
What is the absolute magnitude of Altiar?
The star is called Altair; the absolute magnitude is estimated at 2.21.The star is called Altair; the absolute magnitude is estimated at 2.21.The star is called Altair; the absolute magnitude is estimated at 2.21.The star is called Altair; the absolute magnitude is estimated at 2.21.
What is the suns absolute magnitude from earth?
You cannot ask for an absolute magnitude and specify the distance, as the absolute magnitude is derived from a set distance of 32.616 light years.At that distance, the absolute magnitude of the Sun is +4.83From Earth the apparent magnitude -26.74
What is the absolute magnitude of POLARIS?
-3.64 is the absolute magnitude of Polaris.
Are absolute magnitude and apprent magnitude the same thing?
No. Apparent Magnitude is what it looks to be, whereas absolute is its actual mangnitude.
What is the magnitude of Rigel?
Absolute magnitude: -7.84Apparent magnitude: +0.12
What is the absolute magnitude of the Milky Way?
An estimation of the absolute magnitude is −20.9. See related question.
