Star · G8II
ζ Cyg
ζ Cyg is a bright giant star of spectral type G8II in the constellation Cygnus, 149.5 light-years from the Sun.
| Other names | HIP 104732 |
|---|---|
| Constellation | Cygnus |
| Distance | 149.5 light-years (45.8 pc) |
| Apparent magnitude | magnitude 3.21 |
| Absolute magnitude | magnitude −0.10 |
| Spectral type | G8II |
| Surface temperature | 4,770 K |
| Luminosity | 144 L☉ |
| Radius | 17.6 R☉ |
| Mass | 3.76 M☉ (estimated) |
| Right ascension (J2000) | 21h 12m 56.2s |
| Declination (J2000) | +30° 13′ 37″ |
| Space velocity (relative to the Sun) | 19.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.21). Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° N 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 1876. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.7 million years.
The Sun seen from there
From a planet around ζ Cyg, the Sun would look like a star of magnitude 8.14, in the direction where our sky has the constellation Pyxis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 105496 5.96 light-years
- HIP 106003 10.7 light-years
- HIP 103943 13.7 light-years
- HIP 103376 15.5 light-years
- HIP 107040 17.1 light-years
- HIP 104419 17.1 light-years
- HIP 105510 17.4 light-years
- HIP 103833 17.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.