main-sequence star · A8V
Alderamin
Alderamin is a blue-white main-sequence star (spectral type A8V) about 49 light-years away. With an apparent magnitude of 2.45 it is easy to see even from a city.
It will be the pole star around the year 7500.
Its light output is roughly 20 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
- ≈ 49 light-years
- Spectral type
- A8V (main-sequence star)
- Colour
- Blue-white
- Apparent magnitude
- 2.45 mag
- Luminosity
- ≈ 20 × Sun
- Position
- Right ascension 21h 19m, declination 62.6°
More well-known stars
Data: Hipparcos / HYG catalogue (CC BY-SA 4.0). Luminosity and visibility are calculated estimates.