northern skyBest Feb
Gemini
The Twinsgen. Geminorum
- Brightest
- Castor
- Stars
- 150
- Best viewed
- February
- Sky center
- 111.0°, +23.0°
Alpha Geminorum
in catalog
from mid-latitudes
RA / Dec
Live 3D view
150 stars
pinch · drag
α · Brightest
Castor
Mythology
The twin brothers Castor and Pollux, sons of Leda — one mortal, one immortal. When Castor died, Pollux begged Zeus to share his immortality, and the two were placed in the sky together as a symbol of brotherly devotion.
Brightest stars
top 8 of 150| Star | Bayer | Magnitude | B−V |
|---|---|---|---|
Pollux | 78Bet Gem | 1.16 | 0.99 |
Castor | 66Alp Gem | 1.58 | 0.03 |
Alhena | 24Gam Gem | 1.93 | 0.00 |
Castor B | 66Alp Gem | 2.85 | 0.00 |
Tejat | 13Mu Gem | 2.87 | 1.62 |
Mebsuta | 27Eps Gem | 3.06 | 1.38 |
Propus | 7Eta Gem | 3.31 | 1.60 |
Alzirr | 31Xi Gem | 3.35 | 0.44 |
- Pollux78Bet Gem1.16mag
- Castor66Alp Gem1.58mag
- Alhena24Gam Gem1.93mag
- Castor B66Alp Gem2.85mag
- Tejat13Mu Gem2.87mag
- Mebsuta27Eps Gem3.06mag
- Propus7Eta Gem3.31mag
- Alzirr31Xi Gem3.35mag
Lower magnitude = brighter. B−V color index maps to star color (bluer cooler, redder warmer).