Star
Algol
Algol is a blue-white star 89.9 light-years away, seen as it was 90 years ago, shining 97 times as bright as the Sun.
The Demon Star. Every 2 days 20 hours 49 minutes its companion passes in front of it and it dims for about ten hours.
See it live
It is on the live 3D map, where it really is.
Key facts
- Distance
- 89.9 light-years
- Brightness from Earth
- magnitude 2.09
- Spectral type
- B8V
- Catalogue
- HIP 14576
See it from here
Bright enough to see with your own eyes from a dark place.
How the map draws it
Drawn as a point of light, sized by how bright it looks from where you are — the kind of thing, not this exact one.