Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4263  ·  IC4263  ·  IC4278  ·  M 51  ·  M51  ·  NGC 5194  ·  NGC 5195  ·  NGC5195  ·  Whirlpool galaxy
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The whirlpool Galaxy -  M51 - HaLRGB, 



    
        

            Arnaud Peel
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The whirlpool Galaxy - M51 - HaLRGB

Imaging telescopes or lenses: LACERTA 250/1000 F4 LACERTA NEWTON

Imaging cameras: ZWO 1600mm Cooled Pro

Mounts: SYKYWATCHER EQ6-R

Guiding telescopes or lenses: LACERTA 250/1000 F4 LACERTA NEWTON

Guiding cameras: Altair Astro Altair GPCAM2 IMX224 Colour Guide / Imaging Camera

Focal reducers: GPU Pal Gyulai GPU 2" Aplanatic Coma Corrector

Software: PinInsight 1.8  ·  PHD Labs PHD 2 Guiding  ·  SGP Pro

Filters: Baader Ha 7nm 36mm Baader  ·  ZWO Blue 36mn  ·  ZWO Green 36mn  ·  ZWO Lum 36mm  ·  Zwo Red 36mm


Frames:
221x180" bin 1x1
Baader Ha 7nm 36mm Baader: 121x300" (gain: 139.00)

Integration: 21.1 hours


Astrometry.net job: 2585376

RA center: 13h 29' 52"

DEC center: +47° 11' 53"

Pixel scale: 0.784 arcsec/pixel

Orientation: -93.133 degrees

Field radius: 0.433 degrees


Resolution: 2815x2814

Locations: au Pied du Ventoux, Ventoux, 84, France

Data source: Backyard

Description

Another try at M51 with Ha this time and much more exposure time :
11hours 15min for LRGB and 10hours 05min for Halpha .

I processed the subs and the image with the same method use for M101 my previous image.
For the Light , I selected around 30% of the best Fwhm subs and combined them with all the subs to get sharper details ands smaller stars.
I started with 3 nights : 05, 06, and 08 of February, but I was not happy with the background noise, so I almost double the number of subs , the 23, 24 and 25 of February ...

Red 32 [email protected] -20°C gain 139
Blue 30 [email protected] -20°C gain 139
Green 29 [email protected] -20°C gain 139

Light 134 [email protected] -20°C, gain 139 and zero
Halpha [email protected] -20°C gain 139

Tell me what you think ?

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  • The whirlpool Galaxy -  M51 - HaLRGB, 



    
        

            Arnaud Peel
    Original
  • The whirlpool Galaxy -  M51 - HaLRGB, 



    
        

            Arnaud Peel
    I
  • Final
    The whirlpool Galaxy -  M51 - HaLRGB, 



    
        

            Arnaud Peel
    J

I

Description: Square Zoom

Uploaded: ...

J

Description: Less sharpen !

Uploaded: ...

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The whirlpool Galaxy -  M51 - HaLRGB, 



    
        

            Arnaud Peel