Star
Castor
Castor is a white star 50.9 light-years away, seen as it was 51 years ago, shining 49 times as bright as the Sun.
One point of light, six stars in three pairs. It was first recorded as a double star in 1718.
See it live
It is on the live 3D map, where it really is.
Key facts
- Distance
- 50.9 light-years
- Brightness from Earth
- magnitude 1.58
- Spectral type
- A2Vm
- Catalogue
- HIP 36850
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.