Sh2-308 (Matthieu TEQUI)

Sh2-308

version HOO

Ha: 160x120sec

O3:180x120sec

Pose sur 4 nuits entre le 14/12 et 2/01 couche O3 (pas de lune)

Et 3/01 et 19/01 pour couche Ha.

Suite à une dernière trouée entre 2 nuages, je vous présente une nébuleuse très peu imagée ds notre hémisphère tellement elle est basse

Sh2-308 qui s’apparente à une tête de dauphin (ne pas confondre avec la nébuleuse du dauphin Sh2-188)

Cet objet est une nébuleuse d'émission située à environ 4500 années-lumière dans la constellation du grand chien. La nébuleuse est soufflée par des vents rapides d'une grande étoile de Wolf-Rayet chaude (oui, je les aime😍), la bleue lumineuse près du centre de la nébuleuse. Les étoiles Wolf-Rayet font plus de 20 fois la masse de notre soleil. Le gaz dans cette nébuleuse est principalement l'oxygène qui forme en grande partie cette cible.

Bien que la nébuleuse soit à peu près sphérique, elle est allongée le long d'un axe qui passe du bas à gauche vers le haut à droite (sur mon image) peut être dû à une vitesse d'expulsion de gaz plus élevé aux pôles stellaires opposés. (Si qq’un sait😊)

J’ai également essayé de faire ressortir la composante Ha présente très faiblement dans cette nébuleuse.

Original
Final
B
C

B

Description: photo pour concours photon millenium

Uploaded: ...

C

Description: Très content et honoré d’avoir reçu le premier prix du photon d’or, concours organisé par « photon millenium ».
https://millenniumphoton.com/
Je vous invite à aller voir ce site créé par un astrophotographe de talent également présent sur astrobin: Jean Baptiste Auroux.

Uploaded: ...

Schmidt-Cassegrain Telescope (SCT) Imagers
HyperStar Lens Astrophotography
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	2759009
PixInsight job	R9DCPSWNX0TUKORCPU8RKHLZTAWK6W9X
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m08s.40
RA (top/left)	06h57m51s.54
RA (top/right)	06h50m27s.35
RA (bottom/right)	06h50m22s.48
RA (bottom/left)	06h57m50s.90

Dec (center)	-23°56′07″.8
Dec (top/left)	-23°19′37″.7
Dec (top/right)	-23°18′45″.1
Dec (bottom/right)	-24°32′20″.5
Dec (bottom/left)	-24°33′11″.1

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