Star · G8I
π² Oct
π² Oct is a supergiant star of spectral type G8I in the constellation Octans, 1,573 light-years from the Sun.
| Other names | HIP 73771 |
|---|---|
| Constellation | Octans |
| Distance | 1,573 light-years (482.1 pc) |
| Apparent magnitude | magnitude 5.65 |
| Absolute magnitude | magnitude −2.77 |
| Spectral type | G8I |
| Surface temperature | 4,170 K |
| Luminosity | 2,620 L☉ |
| Radius | 98.1 R☉ |
| Mass | 8.61 M☉ (estimated) |
| Right ascension (J2000) | 15h 04m 46.9s |
| Declination (J2000) | −83° 02′ 18″ |
| Space velocity (relative to the Sun) | 46.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.65). Visible from the whole Southern Hemisphere and north to latitude 7° N. South of latitude 7° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 453. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 28 million years.
The Sun seen from there
From a planet around π² Oct, the Sun would look like a star of magnitude 13.25, in the direction where our sky has the constellation Cepheus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.