Alpha Piscis Austrini


Distance (Light Years) 25.1 ± 0.2
Apparent Magnitude 1.17
Color (B-V)0.09

Names For This Star

The name "Fomalhaut" derives from an Arabic name for this star:Fum al Hut meaning "The Fish's Mouth."

The alternative Latin names for the star, Os Piscis Meridiani or Os Piscis Notii mean "The Mouth of the Southern Fish."

The name Difda al Auwel or Al Difdi` al Awwal is "The First Frog." The Second Frog is Diphda, Beta Ceti.

Description of the Star

Fomalhaut is a white A3V main sequence star having about 1.7 times the diameter of the sun and about 17 times the luminosity. The spectral type implies an effective temperature of 9100 K and a mass of about 2.6 solar masses.

Fomalhaut is the nearest young star to us, where planets appear to be forming. There are also images of dust discs around Fomalhaut and other stars.

Other Designations For This Star


24 Piscis Austrini

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

Smithsonian Astrophysical
Observatory compendium (SAO Number)

Fundamental Katalog (FK5 Number)



Copyright © 1998 - 2010 by Arnold V. Lesikar,
Professor Emeritus
Dept. of Physics, Astronomy, and Engineering Science,
St. Cloud State University,St. Cloud, MN 56301-4498

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