Achernar (star)

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Achernar A
Spectral B6 Vep
Type Main Sequence
Multiple Binary
Luminosity 3150 LSol LSol
Absolute magnitude -2.77
Mag Terra 0.46
Temperature 10,000 - 20,000 K° K
Mass 6.7 MSol MSol
Radius 7.3 RSol x 11.4 RSol RSol
Achernar B
Spectral A1-A3 V
Type Main Sequence
Luminosity LSol
Absolute magnitude
Mag Terra 0.46
Temperature ° K

The star Achernar (also spelled Achenar and otherwise known as Alpha Eridani) is a binary system composed of a hot blue main sequence star of spectral classification B6 orbited by a smaller blue-white main sequence star of spectral type A.

Description (Specifications)

  • Achernar A has an unusually rapid rotational velocity, causing it to become oblate in shape. It is one of the least spherical stars in Galaxias.
  • Achernar B orbits Achernar A at a distance of 12.3AU with an orbital period of about 14.5 years.

The Achernar star system lies approximately 42.8pc from Terra, and is located in a Rimtrailing/Trailing direction from Terra at bearing 290.8o Galactic Longitude and -58.8o South Galactic Latitude.

History & Background (Dossier)

Despite the similarity in name, Achernar is NOT the primary star of the world Archernar/Orichalc (Alpha Crucis 0719), which orbits a yellow-white giant star of classification G4 III. Achernar may or may not have lent its name to the slightly differently spelled world of Archernar which lies in the same sector.

References & Contributors (Sources)

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  • External Link: SIMBAD @ University of Strasbourg: [1]