Star · B5V
23 Cyg
23 Cyg is a main-sequence star of spectral type B5V in the constellation Cygnus, 608.0 light-years from the Sun.
| Other names | HIP 97870 |
|---|---|
| Constellation | Cygnus |
| Distance | 608.0 light-years (186.4 pc) |
| Apparent magnitude | magnitude 5.14 |
| Absolute magnitude | magnitude −1.21 |
| Spectral type | B5V |
| Surface temperature | 12,010 K |
| Luminosity | 499 L☉ |
| Radius | 5.16 R☉ |
| Mass | 5.36 M☉ (estimated) |
| Right ascension (J2000) | 19h 53m 17.4s |
| Declination (J2000) | +57° 31′ 25″ |
| Space velocity (relative to the Sun) | 26.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.14). Visible from the whole Northern Hemisphere and south to latitude 32° S. North of latitude 32° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1418. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 11 million years.
The Sun seen from there
From a planet around 23 Cyg, the Sun would look like a star of magnitude 11.18, in the direction where our sky has the constellation Carina. 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.