18 May 2022
The NGC 6559 star-forming region in Sagittarius, showing both emission (red) and reflection (blue) nebulosity.
NGC 6559
13 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Halpha | 622 | 4h40m | 27 |
| Blue | 578 | 4h20m | 27 |
| Green | 578 | 4h20m | 27 |
| Red | 622 | 4h40m | 27 |