19 Jun 2021
Image of the Whirlpool Galaxy (M51) captured with SPA-2.
Combination of advanced request (H-alpha data) and one-clicks (in LRGB)
Total exposure time 230 minutes.
LRGB 4:9:13:14 subs of 300s (with each filter), H-alpha 6 subs of 300s
Used the H-alpha data to enhance HII-regions a little more.
M51
21 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Luminance | 189 | 6h40m | 127 |
| Green | 130 | 4h36m | 127 |
| Red | 135 | 4h44m | 126 |
| Blue | 130 | 4h34m | 126 |
| Halpha | 36 | 1h15m | 126 |