Sh2-308 en HOOrgb
Données techniques
Sh2-308, also designated as Sharpless 308, RCW 11, or LBN 1052,[1] is an emission nebula and HII region located near the center of the constellation Canis Major, composed of ionised hydrogen.[2] It is about 8 degrees south of Sirius, the brightest star in the night sky. The nebula is bubble-like, surrounding a Wolf-Rayet star named EZ Canis Majoris. This star is in the brief, pre-supernova phase of its stellar evolution. The nebula is about 4,530 light-years (1,389 pc) away from Earth,[3] but some sources indicate that both the star and the nebula are up to 5,870 light-years (1,800 pc) away.[4][5] Yet others indicate the nebula is as close as 1,875 light-years (575 pc) from Earth.[6]
| Emission nebula | |
|---|---|
Sh2-308 taken from the Hubble Space Telescope.
|
|
| Observation data: J2000.0 epoch | |
| Class | 3 2 2 |
| Right ascension | 06h 54m 13s |
| Declination | -22° 55′ 42″ |
| Distance | 4530 ly |
| Apparent magnitude (V) | 7.0 |
| Apparent dimensions (V) | 35′×35′ |
| Constellation | Canis Major |
| Physical characteristics | |
| Radius | 30 ly |
| Designations | Sh-308, RCW 11, LBN 1052 |
Commentaires sur l'objet
Le traitement de cette image a porté essentiellement sur le but de différencier les zones Halpha et OIII, cette impression 3D de la bulle est le résultat.
