27 May 2022
The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula in the constellation Cepheus.
This image was captured with SPA-2 (Officina Stellare ProRC 700), data from 2 one-click observations.
Total integration time 160 minutes.
4 subs of 600s with each filter (LRGB).
NGC 7023
2 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Luminance | 600 | 40m | 4 |
| Red | 600 | 40m | 4 |
| Green | 600 | 40m | 4 |
| Blue | 600 | 40m | 4 |