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Polaris - the current North star is a multiple star system., consisting of the main star and smaller companions.
The main star Alpha Ursae Minoris is a bright star, a 6 solar mass supergiant and it is a main sequence star.
Orbiting very close to this main star is a white dwarf of roughly 1.5 solar masses. This is not a main sequence star.
Orbiting further out is the third companion, a 1.39 solar mass star. This is a main sequence star.
There are also two more distant components (α UMi C and α UMi D) - Polaris is thought to be part of an open cluster - I do not know if these later two stars are main sequence or not.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoSirius A has a spectral type of A1V (the V indicates that it is a main sequence star.)
Wiki User
∙ 14y agoSirius A has a spectral class of A1V meaning it is a white to blue-white star on the main sequence.
Wiki User
∙ 11y agoA high mass star is classified as a star with about 4 times the mass of our Sun.
Our Sun has one solar mass.
Sirius has a mass twice the Sun, so it is NOT a high mass star.
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Is Sirius a cold star?
No. Sirius is far from a cold star. Sirius is actually a binary system about 8.6 light years away. Sirius A is a white main sequence star just over twice the size of the sun. Sirius B is a white dwarf stellar remnant of about 0.978 solar masses. The temperature of the two stars are far higher than that of our sun. The sun is about 5778 Kelvin, Sirius A is almost twice that at 9,940 K and Sirius B is many times that at 25,200 K.
Does a red main sequence star have fusion?
A red main sequence star would be a red dwarf or a branch red giant. To be on the main sequence, you have to have hydrogen nuclear fusion.
The star Algol is estimated to have approximately the same luminosity as the star Aldebaran and approximately the same surface temperature as the star Rigel Algol is best classified as a?
Algol is a blue main-sequence star in the constellation Perseus
Where is Hamal on the main sequence?
Unfortunately, it is impossible to tell accurately where a star is on the main sequence.
How do red dwarfs differ from a main sequence star?
It's the size. A dwarf star has reached the end of the road and has collapsed. It's a little old star and people don't notice it, mostly.
Why is Sirius not a main sequence star?
Sirius is not a single star but a binary star system consisting of a white main sequence star and a white dwarf.
How are Sirius and betelgeuse unlike?
Sirius is a white main sequence star, whereas Betelgeuse is a red supergiant not on the main sequence.
Is sirius a blue super giant?
No. Sirius is a two-star system consisting of a white main sequence star and a white dwarf.
Is Sirius a medium mass star?
Yes, Sirius is about twice as massive as our sun, making it a medium mass star. It is quite a bit brighter, however, and is the second brightest star in our sky.
Which main sequence stars are most massive?
Most stars in the universe today are main sequence stars. Sirius A is the brightest star in the nighttime sky. The sun is the most massive main sequence star in the universe today.
How do you get the scale?
If Our Star Were the size of a Basketball, Sirius A (Main Sequence) Would be a size of A Teddy Bear.
How do you do scale?
If Our Star Were the size of a Basketball, Sirius A (Main Sequence) Would be a size of A Teddy Bear.
How far apart are Sirius A and Sirius B?
Sirius is a binary star system Sirius A and Sirius B.The distance separating Sirius A from B varies between 8.1 and 31.5 AU. (See related question).
What stage is Sirius a in?
main sequence
What is the surface temp and color of the siruis?
Sirius has a surface temperature of approx 9940 K, and is a white main sequence star.
What current stage of stellar evolution is Sirius?
Sirius consists of two stars.Sirius A is a main-sequence star with about two solar masses.Sirius B is a white dwarf with about one solar mass. During its main-sequence, it's estimated to have been around five solar masses.
Is Sirius a cold star?
No. Sirius is far from a cold star. Sirius is actually a binary system about 8.6 light years away. Sirius A is a white main sequence star just over twice the size of the sun. Sirius B is a white dwarf stellar remnant of about 0.978 solar masses. The temperature of the two stars are far higher than that of our sun. The sun is about 5778 Kelvin, Sirius A is almost twice that at 9,940 K and Sirius B is many times that at 25,200 K.
