02 Jul 2023
NGC7293, the Helix Nebula, is depicted here in a bicolor, HOO palette. Note the prominent OIII radial striations that are less apparent in the HST palette.
NGC 7293
13 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Halpha | 800 | 10h | 45 |
| Luminance | 193 | 2h25m | 45 |
| Blue | 173 | 2h10m | 45 |
| Green | 164 | 2h | 44 |
| Red | 164 | 2h | 44 |