Andromeda Galaxy (M31) RGB+HO (Loïck VIGER)

Andromeda Galaxy (M31) RGB+HO

Version française (English Version see below) :
J'ai exhumé des prises de vues de M31 réalisées en octobre-novembre 2021 avec ma petite lunette GT71 et une caméra couleur ASI2600MC ; la première série de vues, avec un filtre Optolong L-PRO sous un ciel Bortle 4, la seconde avec des filtres IDAS NB1 et NBZ sous un ciel Bortle 8. Je ne les avais pas, jusqu'à présent, fonctionnait simultanément. J'ai tenté le coup sans trop y croire… Après une extraction HO des vues obtenues avec les filtres NB1 et NBZ et leur combinaison avec les vues RGB (filtre LPRO), j'ai été surpris du résultat ! Comme quoi, il est possible de réconcilier les ciels nocturnes de la campagne et de la ville, en attendant l'extinction complète des lumières de villes la nuit, pour respecter la biodiversité nocturne et aussi nous éblouir des splendeurs du ciel étoilé !

N'hésitez pas à zoomer l'image : c'est surprenant d'obtenir de tels détails avec une petite lunette de 71mm de diamètre !

English Version :
I unearthed shots of M31 taken in October-November 2021 with my small GT71 refractor and an ASI2600MC color camera; the first series of views, with an Optolong L-PRO filter under a Bortle 4 sky, the second with IDAS NB1 and NBZ filters under a Bortle 8 sky. I had not, until now, treated them together. I gave it a try without really believing it… After an HO extraction of the views made with the NB1 and NBZ filters and their combination with the RGB views (LPRO filter), I was surprised with the result! Like what, it is possible to reconcile the night skies of the countryside and the city, while waiting for the complete extinction of city lights at night, to respect nocturnal biodiversity and also dazzle us with the splendours of the starry sky!

Don't hesitate to zoom in on the image: it's surprising to get such details with a small 71mm diameter telescope!

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Advanced success
Started	...
Astrometry.net job	6904400
PixInsight job	3GSI4WYBTRC0DHAM413R89QVPCCBPXDN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m39s.66
RA (top/left)	00h48m00s.49
RA (top/right)	00h49m04s.88
RA (bottom/right)	00h37m01s.88
RA (bottom/left)	00h36m33s.22

Dec (center)	+41°14′18″.5
Dec (top/left)	+39°31′35″.2
Dec (top/right)	+42°50′07″.4
Dec (bottom/right)	+42°56′04″.3
Dec (bottom/left)	+39°37′20″.1

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