supergiant · G2Ib
Rastaban
Rastaban is a yellow supergiant (spectral type G2Ib) about 380 light-years away. With an apparent magnitude of 2.8 it is easy to see even from a city.
A star in the Dragon's head; the name means "head of the serpent".
Its light output is roughly 880 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
- ≈ 380 light-years
- Spectral type
- G2Ib (supergiant)
- Colour
- Yellow
- Apparent magnitude
- 2.8 mag
- Luminosity
- ≈ 880 × Sun
- Position
- Right ascension 17h 30m, declination 52.3°
More well-known stars
Data: Hipparcos / HYG catalogue (CC BY-SA 4.0). Luminosity and visibility are calculated estimates.