(Alpha Aurigae Ab) is the Bayer Classification for the star. The Bayer Classification was created by Johann Bayer in the early nineteenth century. The brightest star in the constellation is normally given the Alpha designation although there are exceptions such as Pollux which is Beta Geminorum.
More details on objects' alternative names can be found at Star Names .
Capella Ab has a spectral type of G1III. This means the star is a white to yellow giant star.
Capella Ab has been calculated as 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 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.
|Primary / Proper / Traditional Name||Capella Ab|
|Alternative Names||Alpha Aurigae Ab|
|Constellation's Main Star||No|
|Multiple Star System||Yes|
|Star Type||Giant Star|
|Colour||White to Yellow|
|Visual / Apparent Magnitude||0.08|
|Naked Eye Visible||Yes - Magnitudes|
|Right Ascension (R.A.)||05h 16m 41.30|
|Associated / Clustered Stars||Capella|
|Radius (x the Sun)||8.80|
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