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.
M2 variable.
Sirius A has a spectral type of A1V. So it has a colour of white to white blue.
The spectral lines of Sirius are blueshifted because the star is moving more or less toward us.
Sirius is a binary star. Sirius A has a spectral type of A1V and will appear on the HR in the top left corner. Sirius B has a spectral type of DA2 and will appear on the HR in the bottom left corner as a white dwarf.
The spectral class is A0Va.
Our Sun has a spectral class of G2V.
Antares has a spectral class of M1LB.
Spectral class Y, which is typical of "brown dwarf" stars.
Spectral class is classification of stars by their external features..Like light,temperature etc..
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).
Sirius is a binary system, that appears as a single star from EarthSirius A has an absolute magnitude of 1.42Sirius A has an apparent magnitude of -1.46Sirius B has an absolute magnitude of 11.18Sirius B has an apparent magnitude of 8.3See related question for the difference between absolute and apparent.
Sirius B is a white dwarf and has a spectral type of DA2. As it is a white dwarf, it is cooling all the time. It's current temperature is about 25,200 K