Fomalhaut in the birth chart: the royal star of the Southern Fish

Star data

sefstars catalogue, Swiss Ephemeris 2.10.03.

Fomalhaut is the bright star of the Southern Fish and the fourth of the royal stars, alongside Regulus, Aldebaran and Antares. It is the only one of the four with no Mars in its nature: Ptolemy gave it Venus and Mercury. Tradition links it with imagination and artistic gifts. In the tropical zodiac it stands at the beginning of Pisces.

In the sky

Fomalhaut belongs to the small constellation Piscis Austrinus, the Southern Fish. It lies a long way south of the ecliptic, about 21°, much further than the other three royal stars. The Moon never passes in front of it, and planets that share its zodiacal degree are still far from it in the actual sky.

A conjunction with Fomalhaut by zodiacal degree is therefore only a projection: the star and the planet share a degree of longitude, with a wide gap between them in latitude. For stars like this some astrologers use parans instead.

What kind of star it is

Fomalhaut is one of the nearest bright stars, about 25 light-years away. It is a white star of nearly twice the Sun's mass and, by stellar standards, young: its age is estimated at around 450 million years, about a tenth of the Sun's.

It is best known to astronomers for the debris around it. In 2023 the James Webb Space Telescope showed three nested belts of dust, two of them seen for the first time, reaching out to some 23 billion kilometres from the star, about 150 times the distance from the Earth to the Sun. Astronomers think the belts were shaped by the gravity of planets that have not yet been seen. Fomalhaut also has a distant partner: the faint star TW Piscis Austrini, almost a light-year away, moves through space with it and is now regarded as a companion.

Finding it from Ukraine

Fomalhaut is a star of autumn evenings. From September to November it appears low in the south after dark, highest around nine or ten in the evening in October, and sets a few hours later.

From Ukraine it never climbs far. At the latitude of Kyiv it reaches only about 10° above the horizon, in Odesa about 14°, so it needs a clear, flat southern horizon. As early as 1899 Allen called Fomalhaut the most southerly of the prominent stars visible from the latitude of New York, and Ukraine lies further north still. The Sun passes Fomalhaut in late February, and for some weeks around that date the star is out of sight.

The name

The name comes from Arabic and means "mouth of the fish". It describes where the star sits in the constellation figure, at the mouth of the Southern Fish, and says nothing about its character.

Few star names have been spelled in so many ways: the star-name historian Richard Hinckley Allen lists forms such as Fumahant, Fomalhout and Pham al-Hut from different centuries. Ptolemy counted the star twice, in the Southern Fish and at the end of the stream of water poured by Aquarius, and Flamsteed later gave it a catalogue number in each. Fomalhaut is the name approved by the International Astronomical Union.

The Greek picture joins the two constellations: the great fish drinks the water that Aquarius pours out, and Aratus in the Phaenomena places a large bright star by the feet of the Water-pourer. Hyginus tells another story: this fish once saved the goddess Isis when she was in labour, and in return she placed its image among the stars.

Nature according to Ptolemy

In the Tetrabiblos Ptolemy assigns Fomalhaut the nature of Venus and Mercury.

Venus stands for taste, attraction, an orientation toward beauty and what people value. Mercury stands for words, ideas, skill and the ability to give form to what is imagined. Together they describe a gift for expression: writing, music, visual art, any work where an inner image has to be turned into something others can see or hear. Tradition associates Fomalhaut with idealism and with vision that reaches beyond the everyday.

The contrast with the other royal stars helps in reading. Regulus, Aldebaran and Antares describe effort, competition or daring. Fomalhaut's themes work through what a person imagines and expresses. The difference shows in later astrology too: the other three royal stars are among the fifteen Behenian stars that Cornelius Agrippa listed, while Fomalhaut is not on the list.

Conjunctions with planets and angles

Fomalhaut is read by conjunction with planets and angles, within an orb of about 1°. Two cases show the principle:

• Fomalhaut with Venus. The two share a nature, so the star reinforces what Venus already means: a refined sense of beauty, an inclination toward the arts, strong ideals in love. The risk tradition points to here is idealising a person or a project beyond what it is.
• Fomalhaut on the Ascendant. The angle of personal manner takes on the star's dreamy and receptive quality: a person who comes across as imaginative and sensitive to atmosphere and who expresses themselves through some form of art or language.

Precession and the sign

Like every star, Fomalhaut drifts slowly along the zodiac (precession). About three centuries ago it was in the last degrees of Aquarius; now it stands at the beginning of Pisces. Older tables that place it in Aquarius describe an earlier sky, so positions should be taken for the year of birth. Its Ptolemaic nature belongs to the star and does not change with the sign.

In celebrity charts

Conjunctions within 1° to the planets from the Sun to Saturn and to the chart angles.

• Simone Biles: Ascendant, orb 0°28′
• Timothée Chalamet: Descendant, orb 0°36′
• LeBron James: Mars, orb 0°38′

Find fixed stars in your chart