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Capella Ab (Alpha Aurigae Ab) Star Facts

Capella Ab Facts

  • Capella Ab is a giant star that can be located in the constellation of Auriga. The description is based on the spectral class.
  • Capella Ab is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (G1III) of the star, the star's colour is yellow .
  • The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.
  • Capella Ab has a radius that is 8.80 times bigger than the Suns. Radius

Capella Ab's Alternative Names

(Alpha Aurigae Ab) is the Bayer Classification for the star. The Bayer Classification was created by Johann Bayer in 1603. The brightest star in the constellation is normally given the Alpha designation, there are exceptions such as Pollux which is Beta Geminorum.

More details on objects' alternative names can be found at Star Names .

Physical Properties of Capella Ab

Capella Ab Temperature and Colour

Based on the star's spectral type of G1III , Capella Ab's colour and type is yellow giant star. Based on the star's spectral, the stars temperature is between 5,200.00 and 6,000.00 degrees kelvin.

Capella Ab Radius

Capella Ab Radius has been calculated as being 8.80 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 6,123,040.00.km. If you need the diameter of the star, you just need to multiple the radius by 2.

Capella Ab Apparent and Absolute Magnitudes

Capella Ab has an apparent magnitude of 0.08 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

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Additional Capella Ab Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCapella Ab
Alternative NamesAlpha Aurigae Ab
Spectral TypeG1III
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeGiant Star
ColourYellow
GalaxyMilky Way
ConstellationAuriga
Visual / Apparent Magnitude0.08
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)05h 16m 41.30
Associated / Clustered StarsCapella

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)8.80
Calculated Temperature Range5,200.00 - 6,000.00

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