Star · A3V
Fomalhaut
Fomalhaut is a main-sequence star of spectral type A3V in the constellation Piscis Austrinus, 25.1 light-years from the Sun.
| Other names | α PsA · Gl 881 · HIP 113368 |
|---|---|
| Constellation | Piscis Austrinus |
| Distance | 25.1 light-years (7.70 pc) |
| Apparent magnitude | magnitude 1.17 |
| Absolute magnitude | magnitude 1.74 |
| Spectral type | A3V |
| Surface temperature | 8,610 K |
| Luminosity | 19.5 L☉ |
| Radius | 1.98 R☉ |
| Mass | 2.12 M☉ (estimated) |
| Right ascension (J2000) | 22h 57m 39.0s |
| Declination (J2000) | −29° 37′ 20″ |
| Space velocity (relative to the Sun) | 15.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 1.17). Visible from the whole Southern Hemisphere and north to latitude 60° N. South of latitude 60° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 2001. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 446 thousand years.
The Sun seen from there
From a planet around Fomalhaut, the Sun would look like a star of magnitude 4.26, in the direction where our sky has the constellation Leo Minor. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.