The Stars || News || About Stars | Nearest Stars | Big Stars | Special Stars | Exoplanets | Prototype Stars || Constellations || Galaxies || Planets | Moons | Solar System || Convert Values || Stellar Records || Imprint & Privacy

         


Sigma Octantis

The star is also known as Polaris Australis, the southern pole star. It is very close to the southern celestial pole, similar to Polaris is to the northern celestial pole. Admittedly it is by far less luminous as its northern colleague and barely visible with the naked eye.

Sigma Octantis is a yellow subgiant which just left the main sequence. It starts to expand to a red giant.

Constellation: Octans
Distance: 270 light-years
Spectral class: F0
Visual magnitude: 5.47
Luminosity: 34 * Sun
Mass: 2 * Sun
Diameter: 4 * Sun

Back: List of Special Stars
    Sigma Octantis
The region around the southern celestial pole.
Photo: ESO Online Digitized Sky Survey

    Astronomical articles released under Creative Commons: Imprint & Privacy
This site in German: Sterne und Planeten


Astronomy: Stars & Planets | © Jumk.de Webprojects

Images of Chemical Elements