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Polaris Ab (Alpha Ursae Minoris Ab) Star Facts

Polaris Ab Facts

  • Polaris Ab is a main sequence star that can be located in the constellation of Ursa Minor. The description is based on the spectral class.
  • Polaris Ab is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (F6V) of the star, the star's colour is yellow to white .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • Polaris Ab has a radius that is 1.04 times bigger than the Suns. Radius

Polaris Ab's Alternative Names

(Alpha Ursae Minoris 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 Polaris Ab

Polaris Ab Temperature and Colour

Based on the star's spectral type of F6V , Polaris Ab's colour and type is yellow to white main sequence star. Based on the star's spectral, the stars temperature is between 6,000.00 and 7,500.00 degrees kelvin.

Polaris Ab Radius

Polaris Ab Radius has been calculated as being 1.04 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 723,632.00.km. If you need the diameter of the star, you just need to multiple the radius by 2.

Polaris Ab Apparent and Absolute Magnitudes

Polaris Ab has an apparent magnitude of 9.20 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.

Distance to Polaris Ab

Polaris Ab is an estimated 431.43 light years from our Solar System (Earth and Sun). It would take a spaceship 431.43 years travelling at the speed of light to get there. We don't have a space ship that can travel that distance or at that speed yet.

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Additional Polaris Ab Facts and Figures

Visual Facts


Primary / Proper / Traditional NamePolaris Ab
Alternative NamesAlpha Ursae Minoris Ab
Spectral TypeF6V
Constellation's Main StarNo
Multiple Star SystemYes
Star Type Main Sequence Dwarf Star
ColourYellow - White
GalaxyMilky Way
ConstellationUrsa Minor
Visual / Apparent Magnitude9.20
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Distance from the Sun / Earth431.43 Light Years
Associated / Clustered StarsPolaris
Polaris B

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)1.04
Calculated Temperature Range6,000.00 - 7,500.00

Location of Polaris Ab in Ursa Minor


Polaris Ab Location in Ursa Minor

The map was generated using Night Vision, an awesome free application by Brian Simpson.

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