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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.
What else can I help you with?
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.
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.
How are Sirius and betelgeuse unlike?
Sirius and Betelgeuse are both bright stars in the night sky, but they differ in size, color, and temperature. Sirius is a white star, while Betelgeuse is a red supergiant. Betelgeuse is also much larger and cooler than Sirius.
What is the color of Sirius?
Sirius is actually a binary star system.Sirius A is a type A1V star so has a colour of Blue White -> BlueSirius B is a white dwarf.
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.
What is the spectral class of Sirius?
Sirius is classified as an A-type main sequence star. It is specifically categorized as an A1V star, with a surface temperature of about 9,940 K.
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.
