Gemini
The twins. Genitive Geminorum, abbreviated Gem. Introduced by Ptolemy.
Area
513.76 sq°
30 of 88 by size
Brightest star
β Geminorum
magnitude 1.14
Best seen
January
on the meridian at midnight
Visible from
90°N to 80°S
some part above the horizon
Where it is
Principal stars
Every star to magnitude 4, brightest first.
| Star | Magnitude | HR |
|---|---|---|
| β Geminorum | 1.14 | 2990 |
| γ Geminorum | 1.93 | 2421 |
| α Geminorum | 1.98 | 2891 |
| μ Geminorum | 2.88 | 2286 |
| α Geminorum | 2.88 | 2890 |
| ε Geminorum | 2.98 | 2473 |
| η Geminorum | 3.28 | 2216 |
| ξ Geminorum | 3.36 | 2484 |
| δ Geminorum | 3.53 | 2777 |
| κ Geminorum | 3.57 | 2985 |
| λ Geminorum | 3.58 | 2763 |
| θ Geminorum | 3.60 | 2540 |
| ζ Geminorum | 3.79 | 2650 |
| ι Geminorum | 3.79 | 2821 |
Deep sky
Objects with a Messier number or a name people use.
| Object | Catalogue | Type | Magnitude | Size |
|---|---|---|---|---|
| M35 | NGC 2168 | Open cluster | 5.1 | 28.0 |
| Eskimo nebula | NGC 2392 | Planetary nebula | 10.0 | 0.7 |
- Magnitude: — where NGC 2000 gives none.
- Size: the largest dimension, in arcminutes.
My Sky
Rise, highest and set over your place, for any night: Gemini
Further info
Sources
Principal stars: Bright Star Catalogue
Deep sky: NGC 2000.0
Area and borders: IAU constellation boundaries
