Hemisphere:  Northern  ·  Constellation: Pisces (Psc)  ·  Contains:  M 74  ·  M74  ·  NGC 628
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M74  Phantom Galaxy  - another splendid Spiral - version Ha-LRGB, 



    
        

            Arnaud Peel
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M74 Phantom Galaxy - another splendid Spiral - version Ha-LRGB

Imaging telescopes or lenses: LACERTA NEWTON NEWTON 300 F4 /1200mm

Imaging cameras: ZWO ASI6200MM

Mounts: AstroPhysics AP1100 CP3

Guiding telescopes or lenses: LACERTA NEWTON NEWTON 300 F4 /1200mm

Guiding cameras: ZWO ASI290M

Focal reducers: Wynne Coma Corrector 3"

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

Filters: LRGB


Dates:Nov. 19, 2020

Frames:
Chroma Ha 3nm: 6x300" bin 1x1
LRGB: 150x180" bin 1x1

Integration: 8.0 hours

Avg. Moon age: 4.73 days

Avg. Moon phase: 23.29%


Astrometry.net job: 4171567

RA center: 1h 36' 41"

DEC center: +15° 47' 8"

Pixel scale: 0.652 arcsec/pixel

Orientation: -175.718 degrees

Field radius: 0.309 degrees


Resolution: 2415x2415

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

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

The goal was to get the arms as long as possible (you can see some small galaxies at extremities )
and the possible details in the arms
For this version, I added the Halpha layer and try to keep saturation at a low level
M74 finally looks like a small M101

Wiki :
Messier 74 (also known as NGC 628 and Phantom Galaxy) is a spiral galaxy in the constellation Pisces. It is at a distance of about 32 million light-years away from Earth. The galaxy contains two clearly defined spiral arms and is therefore used as an archetypal example of a grand design spiral galaxy. It is estimated that M74 is home to about 100 billion stars.

70 Light subs @180s gain zero and -15°C and
6 Hapha subs @300s gain zero and -15°C and

20 Blue subs @180s gain zero and -10°C
20 Green subs @180s gain zero and -10°C
20 Red subs @180s gain zero and -10°C

Total exposure 8 hours

Comments

Revisions

  • M74  Phantom Galaxy  - another splendid Spiral - version Ha-LRGB, 



    
        

            Arnaud Peel
    Original
  • M74  Phantom Galaxy  - another splendid Spiral - version Ha-LRGB, 



    
        

            Arnaud Peel
    B
  • M74  Phantom Galaxy  - another splendid Spiral - version Ha-LRGB, 



    
        

            Arnaud Peel
    C
  • Final
    M74  Phantom Galaxy  - another splendid Spiral - version Ha-LRGB, 



    
        

            Arnaud Peel
    D

Sky plot

Sky plot

Histogram

M74  Phantom Galaxy  - another splendid Spiral - version Ha-LRGB, 



    
        

            Arnaud Peel