Star · K4II
63 Cyg
63 Cyg is a bright giant star of spectral type K4II in the constellation Cygnus, 1,288 light-years from the Sun.
| Other names | HIP 104194 |
|---|---|
| Constellation | Cygnus |
| Distance | 1,288 light-years (394.9 pc) |
| Apparent magnitude | magnitude 4.56 |
| Absolute magnitude | magnitude −3.42 |
| Spectral type | K4II |
| Surface temperature | 3,690 K |
| Luminosity | 8,470 L☉ |
| Radius | 225 R☉ |
| Mass | 12 M☉ (estimated) |
| Right ascension (J2000) | 21h 06m 36.1s |
| Declination (J2000) | +47° 38′ 54″ |
| Space velocity (relative to the Sun) | 28.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.56). Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° 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 738. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 23 million years.
The Sun seen from there
From a planet around 63 Cyg, the Sun would look like a star of magnitude 12.81, in the direction where our sky has the constellation Vela. 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.