Hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  Dumbbell Nebula  ·  M 27  ·  NGC 6853  ·  The star 14Vul
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M27 Dumbell Nebula, 



    
        

            Ulli_K
M27 Dumbell Nebula
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M27 Dumbell Nebula

Technical card

Imaging telescopes or lenses: Vixen Newton R200SS f/4

Imaging cameras: Canon EOS 760D

Mounts: Losmandy G9

Focal reducers: Vixen Extender PH

Software: Pleiades Pixinsight 1.8.6 Ripley

Accessory: Lacerta MGEN 2 at 8x50 finder


Dates:Nov. 21, 2020

Frames: 23x480" ISO800

Integration: 3.1 hours

Flats: ~15

Bias: ~27

Avg. Moon age: 6.72 days

Avg. Moon phase: 42.94%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 4054561

RA center: 19h 59' 48"

DEC center: +22° 53' 34"

Pixel scale: 0.687 arcsec/pixel

Orientation: 87.920 degrees

Field radius: 0.593 degrees


Resolution: 5166x3451

Locations: Garten, Schwäbisch Gmünd, Germany

Data source: Traveller

Description

After some months of break I started again. M27 was in good position for the first half of a night. It's not the first time I tried this object:
2019 version: https://www.astrobin.com/esnk6q/
2017 version processed in 2019: https://www.astrobin.com/421333/C/
2017 version processed in 2017: https://www.astrobin.com/421333/0/?nc=

Tis year I used an Optolong L-enhance filter for the first time. Exposure time could be increased to 480s and contrast was much better.
It's good seeing some progress ;-)
Comments are welcome
CS, Ulli

Comments

Revisions

  • M27 Dumbell Nebula, 



    
        

            Ulli_K
    Original
  • M27 Dumbell Nebula, 



    
        

            Ulli_K
    B
  • Final
    M27 Dumbell Nebula, 



    
        

            Ulli_K
    D

B

Description: I used TGV denoise to "soften" the outer parts of the nebula that suffered from stretching. It was really hard to find the right mask for these fainter parts. I worked with the script ColorMask and used a combination of a cyan and a yellow(!) mask for the OIII and Ha regeions, respectively.

Uploaded: ...

D

Description: going back a few steps and trying with ExponetialTransformation

Uploaded: ...

Sky plot

Sky plot

Histogram

M27 Dumbell Nebula, 



    
        

            Ulli_K

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