Sigma Sagittarii

Nunki, Bayer designation Sigma Sagittarii, even under the proper name Sadira Pelagus known, is the second brightest star in the constellation Sagittarius. Its apparent brightness is 2.01 like the spectral type is B3. The star is located at a distance of about 220 light years. Due to the extinction Sigma Sagittarii is visible up to a horizon of 2.1 °. The apparent surface or transition occurs and the actual premium or sinking about 12 to 15 minutes later or earlier.

The name is Nunki Sumerian origin and is in the Sumerian form of writing Nunki ( Divine place on earth ) the name of the ancient holy city of Eridu, the seat of the large underwater ocean Apzu.

Nunki can ( very rare! ) As ekliptiknaher star from the moon and planets are covered. The last eclipse of Nunki by a planet took place November 17, 1981 by Venus. Nunki is also the brightest star that can be covered by an outer planet ( because of the location of the railway junction, the outer planets in the period from 5000 BC to 5000 AD, no ekliptiknahen 1 star Regulus size as cover ) and Although Mars. However, this is an extremely rare event, which occurred last September 3, 423.

Notes and References

  • Sagittarius ( constellation )
  • Binary star
  • Individual star of the second magnitude
Declination Astrometry Radial velocity Light-year Color index Solar mass Bright Star Catalogue Smithsonian Astrophysical Observatory Star Catalog Extinction (astronomy)
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