Star · F6V
τ PsA
τ PsA is a main-sequence star of spectral type F6V in the constellation Piscis Austrinus, 60.2 light-years from the Sun.
| Other names | Gl 849.1 · HIP 109422 |
|---|---|
| Constellation | Piscis Austrinus |
| Distance | 60.2 light-years (18.5 pc) |
| Apparent magnitude | magnitude 4.94 |
| Absolute magnitude | magnitude 3.61 |
| Spectral type | F6V |
| Surface temperature | 6,440 K |
| Luminosity | 3.09 L☉ |
| Radius | 1.41 R☉ |
| Mass | 1.33 M☉ (estimated) |
| Right ascension (J2000) | 22h 10m 08.8s |
| Declination (J2000) | −32° 32′ 54″ |
| Space velocity (relative to the Sun) | 40.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.94). Visible from the whole Southern Hemisphere and north to latitude 57° N. South of latitude 57° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1966. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.1 million years.
The Sun seen from there
From a planet around τ PsA, the Sun would look like a star of magnitude 6.16, 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):
- GJ 4242A 4.02 light-years
- Gl 862 10.1 light-years
- HIP 110922 10.7 light-years
- GJ 4272 10.7 light-years
- CWISEP J213838.74-313808.5 11.2 light-years
- HIP 112312 11.4 light-years
- HIP 111391 11.7 light-years
- Gl 836 12.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.