Sigma Octantis
- For the counterpart on the northern sky see Polaris.
- For the town square in Berlin- Kreuzberg see Südstern
- For the former football club Neuköllner see NSC Südstern - Azur
- For the sports club, see BG Karlsruhe Karlsruhe
- For the novel by French author Jules Verne The Southern Star or The Land of diamonds see The Southern Star or The Land of diamonds.
- See also: Polar Star (disambiguation) and Stella Polaris
Polaris Australis ( Südpolarstern, also: Südstern ) is the proper name of the star σ Octantis.
Sigma Octantis is the southern counterpart of the North Star, because he is the southern celestial pole closest visible to the naked eye star. However, it is unsuitable as a navigational star due to its low apparent magnitude of 5.47 m.
σ Octantis also bears the catalog designations of HR 7228 and HD 177482nd It belongs to the spectral class F0III and is about 270 light-years away from Earth ( Hipparcos catalog).
Polaris Australis is pictured in the flag of Brazil, where he represented the Distrito Federal do Brasil at the capital Brasília.
Coordinates
- Right Ascension: 21h08m46, 2s
- Declination: -88 ° 57'23 "