The Constellation Directory

Piscis Austrinus

"The Southern Fish"

Piscis Austrinus

By IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg) [CC-BY-3.0], via Wikimedia Commons

Abbreviation: PsA
Genitive: Piscis Austrini
Constellation family: Heavenly Waters
Nearest constellations: Aquarius, Capricornus, Grus, Microscopium, and Sculptor
Right ascension: 22.29h
Declination: -30.66°
Visible between latitudes: +50° and -90°
Square degrees: 245
Luminary: Fomalhaut (Alpha Piscis Austrini)
Named stars: Fomalhaut
Notable deep sky objects: Hickson Compact Group 90


Piscis Austrinus by Gerard Mercator

By Gerard Mercator [Public domain], via Wikimedia Commons

Piscis Austrinus is a small constellation in the Southern Hemisphere that is visible during October. Its luminary, Fomalhaut, is the eighteenth-brightest star in the night sky.

Piscis Austrinus belongs to the "water" section of the sky, so called because of the number of water-related constellations in the surrounding sky: Aquarius, Cetus, Delphinus, Eridanus, and Pisces.

In addition, Piscis Austrinus is a particularly old constellation; it has origins tracing back to Babylonian times.


Piscis Austrinus is often depicted as a fish drinking from a jar held by neighboring Aquarius.