18 Dec 2025
Sh 2-261 (Lower’s Nebula) is an emission nebula in the constellation Orion. It is approximately 3,300 light-years from Earth.
Sh 2-261
6 credit
Filtro | Exp. media (s) | Esposizione totale | Sottoframe |
|---|---|---|---|
| Halpha | 291 | 2h35m | 32 |
| SII | 309 | 2h45m | 32 |
| OIII | 300 | 2h35m | 31 |