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Polaris B, Alpha Ursae Minoris B

Polaris B (Alpha Ursae Minoris B) is a blue to white main sequence dwarf star that can be located in the constellation of UrsaMinor. The star can not be seen by the naked eye, you need a telescope to see it.

Polaris B's Alternative Names

Alpha Ursae Minoris B is the Bayer Classification for the star.

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

Physical Properties (Colour, Radius) of Polaris B

Polaris B has a spectral type of F3V. This means the star is a blue to white main sequence dwarf star. Polaris B lies at a distance of 431.43 light years away from our Sun and our planet Earth or to put it another way, 132.27 parsecs away from the Sun.

Polaris B has been calculated as 1.38 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 960,204.00.km.

Polaris B Apparent and Absolute Magnitudes

Polaris B has an apparent magnitude of 8.70 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 B

Polaris B 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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Polaris B Facts

Visual Facts

Alternative NamesAlpha Ursae Minoris B
Star Type main sequence Dwarf Star
GalaxyMilky Way
ConstellationUrsa Minor
Visual / Apparent Magnitude8.70
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Declination (Dec.)+89 ° 51` 38.1
Distance from the Sun / Earth431.43 Light Years
Spectral TypeF3V
Associated / Clustered StarsPolaris
Polaris Ab
Colour(F) blue to white

Estimated Facts

Radius (x the Sun)1.38

Location of Polaris B in Ursa Minor

Polaris B (Alpha Ursae Minoris B) Location in Ursa Minor

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

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