30 Aug 2022
NGC 6559 (left part of the image) is a star-forming region located about 5000 light-years away in the constellation of Sagittarius, very close to Messier 8 Nebula and showing both emission (red) and reflection (bluish) regions.
At the center, the emission nebula IC 4685 is crossed by the dark nebula Barnard 303.
H : 28x600s
R : 28x600s
G : 26x600s
B : 26x600s
Processing is RHa-HaRGB.
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 |