17 Oct 2020
3x20" RGB for the bright core, and 3x180" RGB for fainter nebulosity. Combined using a luminosity mask to bring out the Trapezium Cluster while keeping the overall noise level low.
M42
8 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Green | 40 | 58m | 86 |
| Luminance | 50 | 1h12m | 86 |
| Red | 25 | 36m | 85 |
| Blue | 24 | 34m | 85 |
| Halpha | 123 | 2h54m | 85 |