Alpha-1 Capricorni, Alpha-2 Capricorni
Alpha-1 Cap – Algiedi Prima – Prima Giedi – Binary star in Capricornus
Alpha-2 Cap – Algedi – Triple star in Capricornus
I hoped to be able to resolve BC components of Alpha-2 Cap. Separated to ~6.6” with 7+ difference in magnitude - well, it’s not that easy. I think I saw something so I added something to the sketch…
| Objects | Alpha-1 Capricorni, Alpha-2 Capricorni |
|---|---|
| Observed at | Dunaharaszti, HU, 2025-09-19 22:20 |
| NELM | ~ 4.4 |
| Seeing | 7 |
| Aperture | 127 mm |
| Magnification | 220x |
| FOV | 0.24° |
Object data
| Objects | Alpha-1 Capricorni | Alpha-2 Cap A | Alpha-2 Cap BC |
|---|---|---|---|
| Fetched as | HD 192876 | HD 192947 | |
| Desc. | Binary star with a yellow supergiant primary | Yellow star † | Binary star |
| RA | 20h 17m 38s † | 20h 18m 03s † | |
| Dec | -13° 29’ 30” † | -13° 27’ 19” † | |
| Magnitude | 4.27 + 8.6 | 3.57 | ~11 |
| Spectral class | G3Ib † | G6/G8III † |
† fetched from astronomyapi.com
