Sigma Octantis

star in the constellation Octans

Sigma Octantis is the current southern pole star. It is an F-type giant star.[1] It is 7,415 degrees Kelvin.[2]


  1. Malaroda, S. (1 August 1975). "Study of the F-type stars. I. MK spectral types". The Astronomical Journal. 80: 637–641. doi:10.1086/111786 – via NASA ADS.
  2. David, Trevor J.; Hillenbrand, Lynne A. (1 May 2015). [ "The Ages of Early-type Stars: Str�mgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets"]. The Astrophysical Journal. 804: 146. doi:10.1088/0004-637X/804/2/146 – via NASA ADS. replacement character in |title= at position 34 (help)