Castor
The second of the Gemini twins, which a telescope shows to be several stars, six in all, bound together.
Tonight from
Rise, highest point and set are worked out on your device for the place above.
What it is
- Brightness
- Magnitude 1.58, the 25th brightest star in the night sky
- Distance
- 51 light years
- Kind of star
- White main-sequence star, spectral type A2 V
- Light it gives out
- About 49 times the Sun’s, in visible light
- Constellation
- Gemini, where it is α Geminorum
- Catalogue number
- HIP 36850
Figures from HYG database 4.1 (Hipparcos, Yale Bright Star and Gliese catalogues), CC BY-SA 4.0. All sources