subgiant · G9.5IV
Alshain
Alshain is a yellow subgiant (spectral type G9.5IV) about 45 light-years away. With an apparent magnitude of 3.7 it is easy to see with the naked eye under a dark sky.
A star in Aquila, next to Altair.
Its light output is roughly 5.4 times that of the Sun (a rough estimate in visible light, calculated from brightness and distance).
From Germany (52° N) it rises and sets; it is best seen in the evening in July.
Key facts
- Distance
- ≈ 45 light-years
- Spectral type
- G9.5IV (subgiant)
- Colour
- Yellow
- Apparent magnitude
- 3.7 mag
- Luminosity
- ≈ 5.4 × Sun
- Position
- Right ascension 19h 55m, declination 6.4°
More well-known stars
Data: Hipparcos / HYG catalogue (CC BY-SA 4.0). Luminosity and visibility are calculated estimates.