Alpha Geminorum
Alpha Gem – α Gem – Castor – Star system in Gemini
Looks like an ‘ordinary’ double star, but it’s a sextuple star system organized into three binary pairs. It’s nice and shiny but not so interesting on the drawing nor to draw. I’ve chosen this star ad-hoc to complete the sketch page containing M42 and M43.
| Object | Alpha Geminorum |
|---|---|
| Observed at | Dunaharaszti, HU, 2025-11-19 01:15 |
| NELM | ~ 4.2 |
| Seeing | 7 |
| Aperture | 127 mm |
| Magnification | 103x |
| FOV | 0.66° |
Object data
| Objects | Alpha Gem A | Alpha Gem B | Alpha Gem C |
|---|---|---|---|
| Fetched as | HD 60179 | HD 60178 | |
| Desc. | Spectroscopic binary | Spectroscopic binary | Spectroscopic binary |
| RA | 07h 34m 35s † | 07h 34m 36s † | |
| Dec | 31° 53’ 18” † | 31° 53’ 26” † | |
| Magnitude | 1.9 | 3.0 | 9.8 |
| Spectral class | A2Vm † | A m † |
† fetched from astronomyapi.com
