Alpha Centauri A - It is 4.365 light years away and has a spectral class of G2V the same as our Sun
The Sun is a G-type main-sequence star, also known as a G2V star. This classification places the Sun in the "yellow dwarf" category.
Barnard's Star is a red dwarf star, belonging to the class M. This classification is based on its low surface temperature and spectral characteristics.
See related link and you'll be able to work it out.
If you are referring to the Yerkes spectral classification, a Class IV star is known as a subgiant.
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.
A star with a spectral class of O is classified as a Blue Star. A red star will have a spectral class of M See related question
A star with luminosity class VI under the Yerkes Spectral Classification System. They have luminosity 1.5 to 2 magnitudes lower than main-sequence stars of the same spectral type.
Sirius is a double star. The brighter component ... the one you actually notice in the night sky ... is spectral class A1V. The faint 'secondary' component is spectral class DA2.
It is an orange giant with a spectral class of K3....
It is an orange giant with a spectral class of K3....
Eta Pegasi (Matar) is a star in the constellation Pegasus.It has a spectral type of G2 so it has a colour of yellow.Matar has the same spectral class as our Sun
The Sun is a G-type main-sequence star, also known as a G2V star. This classification places the Sun in the "yellow dwarf" category.
Barnard's Star is a red dwarf star, belonging to the class M. This classification is based on its low surface temperature and spectral characteristics.
Based on what? Luminosity, distance or spectral class?
Red stars (Red dwarfs and red giants) have a spectral class of M.
See related link and you'll be able to work it out.
Red stars (Red dwarfs and red giants) have a spectral class of M.