M81-M82 Les galaxies de Bode et du cigare (Matthieu TEQUI)

M81-M82 Les galaxies de Bode et du cigare

L: 210X60sec gain 30

RVB: 3X30X60sec gain 30

Ha: 30X120sec gain 139

Même si M81 et 82 sont les stars de cette photo, on y trouve également beaucoup d'autres galaxies. On y devine notamment une petite galaxie spiraée UGC5302 à la toute gauche de l'image ainsi que NGC 3077, une galaxie irrégulière située en haut de l'image. Bcp d'autres plus petites ou irrégulières sont également visibles.

L'acquisition s'est déroulée sur 3 nuits avec quelques difficultés: nouveau setup (tube et monture), nouveau logiciel d'acquisition et un ciel assez capricieux...

Il a donc fallu apprendre à maitriser tout ça. ça reste encore perfectible mais ça vient.

Concernant le traitement:

-ajout de la couche Ha avec le rouge en linéaire

-assemblage RVB en nonlinéaire sur Pixinsight

-La luminance est prétraitée en drizzle2 (grâce au dithering).

-ajout de la L avec la RVB puis quelques courbes pour l'esthétique

———————————————————————

English:

Even if M81 and 82 are the stars of this photo, there are also many other galaxies. We can see in particular a small coiled galaxy UGC5302 at the very left of the image as well as NGC 3077, an irregular galaxy located at the top of the image. Lot of other smaller or irregular are also visible.

The acquisition took place over 3 nights with some difficulties: new setup (tube and mount), new acquisition software and a rather capricious sky ...

So we had to learn to master it all. it is still perfectible but it comes.

Regarding treatment:

-addition of the Ha layer with the red in linear

- RGB assembly in nonlinear on Pixinsight

-The luminance is preprocessed in drizzle2 (thanks to dithering).

-addition of the L with the RGB then some curves for the esthetics.

Final
Original
B

B

Description: crop

Uploaded: ...

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

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Status	Advanced success
Started	...
Astrometry.net job	3333801
PixInsight job	XKXZE2M14QYVA9GHE9L8R3RHBHI7E1CM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h56m05s.428
RA (top/left)	10h03m59s.999
RA (top/right)	10h03m04s.204
RA (bottom/right)	09h47m30s.733
RA (bottom/left)	09h49m42s.332

Dec (center)	+69°16′19″.34
Dec (top/left)	+68°22′49″.22
Dec (top/right)	+70°14′27″.11
Dec (bottom/right)	+70°08′20″.22
Dec (bottom/left)	+68°17′11″.72

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