Polaris B (Alpha Ursae Minoris B) is a blue to white main sequence dwarf star that can be located in the constellation of UrsaMinor. Polaris B is the brightest star in Ursa Minor based on the Hipparcos 2007 apparent magnitude. The star can not be seen by the naked eye, you need a telescope to see it.
Alpha Ursae Minoris B is the Bayer Classification for the star.
Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 3.0000000 that I have given is based on the Spectral Types page that I have found on the Internet. You might find a different figure, one that may have been calculated rather than generalised that I have done. The figure is always the amount times the luminosity of the Sun. It is an imprecise figure because of a number of factors including but not limited to whether the star is a variable star and distance.
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.
The star has a companion star which is in orbit close by, it has at least the following companions in close orbit, .
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.
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.
|Traditional/Proper Name||Polaris B|
|Bayer Designation||Alpha Ursae Minoris B|
|Star Type||main sequence dwarf star|
|Visual / Apparent Magnitude||8.70|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Declination (Dec.)||+89 d 51 ` 38.1|
|Distance from the Sun / Earth||431.43 Light Years|
|Colour||(F) blue to white|
|Radius (x the Sun)||1.38|
|Luminosity (x the Sun)||3.0000000|
The map was generated using Night Vision, an awesome free application by Brian Simpson.