Star · F5
σ Hyi
σ Hyi is a main-sequence star of spectral type F5 in the constellation Hydrus, 133.1 light-years from the Sun.
| Other names | HIP 8991 |
|---|---|
| Constellation | Hydrus |
| Distance | 133.1 light-years (40.8 pc) |
| Apparent magnitude | magnitude 6.15 |
| Absolute magnitude | magnitude 3.10 |
| Spectral type | F5 |
| Surface temperature | 6,630 K |
| Luminosity | 4.91 L☉ |
| Radius | 1.68 R☉ |
| Mass | 1.49 M☉ (estimated) |
| Right ascension (J2000) | 1h 55m 50.6s |
| Declination (J2000) | −78° 20′ 55″ |
| Space velocity (relative to the Sun) | 23.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.15). Visible from the whole Southern Hemisphere and north to latitude 12° N. South of latitude 12° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1893. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around σ Hyi, the Sun would look like a star of magnitude 7.88, in the direction where our sky has the constellation Ursa Minor. It would be invisible 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.