29 Jul 2023
The Helix Nebula (NGC 7293) is a planetary nebula located in the constellation Aquarius discovered by Karl Ludwig Harding. I prefer my LRGB version to my narrow band attempt.
NGC 7293
13 credit
Filter | Avg Exp (s) | Total Exposure | Subframes |
|---|---|---|---|
| Halpha | 800 | 10h | 45 |
| Luminance | 193 | 2h25m | 45 |
| Blue | 173 | 2h10m | 45 |
| Green | 164 | 2h | 44 |
| Red | 164 | 2h | 44 |