supergiant · A2Ia
Deneb
Deneb is a blue-white supergiant (spectral type A2Ia) about 2,600 light-years away. With an apparent magnitude of 1.25 it is a very bright, conspicuous star.
One of the most luminous stars known. Its distance is uncertain.
Its light output is roughly 171,800 times that of the Sun (a rough estimate in visible light, calculated from brightness and distance).
From Germany (52° N) it never sets: it stays above the horizon all year.
Key facts
- Distance
- ≈ 2,600 light-years
- Spectral type
- A2Ia (supergiant)
- Colour
- Blue-white
- Apparent magnitude
- 1.25 mag
- Luminosity
- ≈ 171,800 × Sun
- Position
- Right ascension 20h 41m, declination 45.3°
More well-known stars
Data: Hipparcos / HYG catalogue (CC BY-SA 4.0). Luminosity and visibility are calculated estimates.