main-sequence star · F5V
Diadem
Diadem is a yellow-white main-sequence star (spectral type F5V) about 58 light-years away. With an apparent magnitude of 4.33 it is easy to see with the naked eye under a dark sky.
The alpha star of Coma Berenices; a close double star in a telescope.
Its light output is roughly 5 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 April.
Key facts
- Distance
- ≈ 58 light-years
- Spectral type
- F5V (main-sequence star)
- Colour
- Yellow-white
- Apparent magnitude
- 4.33 mag
- Luminosity
- ≈ 5 × Sun
- Position
- Right ascension 13h 10m, declination 17.5°
More well-known stars
Data: Hipparcos / HYG catalogue (CC BY-SA 4.0). Luminosity and visibility are calculated estimates.