There is no star just called "Alpha". Alpha is the first letter of the Greek alphabet, and the main star of each of the 88 constellations is called "Alpha", followed by the name of the constellation (in genitive form). For example, Alpha Canis Majoris, Alpha Centauri, Alpha Geminis, etc.
The star Alpha Cancri, also known as Acubens, is a binary star system with two stars. The primary star, Alpha Cancri A, has a surface temperature of approximately 6,300 Kelvin, while the secondary star, Alpha Cancri B, has a surface temperature of around 5,100 Kelvin.
Alpha Capricorni, also known as Algedi, is a binary star system. The primary star, Alpha Capricorni A, has a surface temperature estimated to be around 4,900 degrees Celsius. The secondary star, Alpha Capricorni B, has a lower surface temperature of around 3,700 degrees Celsius.
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65,000 degrees is how hot Alpha is.
3882 Kelvin
Alpha Ceti (Menkar, Menkab) is a star in the constellation of Cetus.It has a temperature of about 3,700K
Alpha Centauri has a temperature ranging from 5,000-6,000K.
Alpha Phoenicis (or Ankaa) is an orange giant in the constellation Phoenix.It has a temperature of about 4,850 Kelvin
The surface temperature of the star Thuban is 9800 K. Another name for the Thuban star is Alpha Draconis. It is thought to be located 310 light years from the constellation of Draco.
Rigil Kentaurus, also known as Alpha Centauri, is actually a system of three stars. The primary star, Alpha Centauri A, has a surface temperature of about 5,800 degrees Celsius, similar to our Sun.
Menkar (Alpha Ceti) is the alpha star in Cetus.
There is no star that is simply called "Alpha". There are several that have "alpha" in their name, for example Alpha Centauri, Alpha Cruxis, Alpha Canis Majoris, etc. - usually the brightest star in each constellation. Some stars such as Betelgeuse (Alpha Orionis) are not actually the brightest star in the constellation.