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Contains:  Helix nebula, NGC 7293
Getting plate-solving status, please wait...
NGC 7293 - The Helix Nebula (L-RGB), 


            Olivier Ravayrol
NGC 7293 - The Helix Nebula (L-RGB)
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NGC 7293 - The Helix Nebula (L-RGB)

Technical card

Dates:Sept. 21, 2015

Frames:Astronomik CCD CLS Canon EOS Clip: 27x240" ISO800

Integration: 1.8 hours

Darks: ~6

Flats: ~11

Bias: ~100

Avg. Moon age: 7.51 days

Avg. Moon phase: 51.40%

Bortle Dark-Sky Scale: 5.00

Basic astrometry details job: 3255926

RA center: 22h 29' 20"

DEC center: -20° 49' 19"

Pixel scale: 1.064 arcsec/pixel

Orientation: 286.974 degrees

Field radius: 0.761 degrees

Resolution: 4290x2856

Locations: Observatoire personnel, Tournefeuille, Haute-Garonne, France

Data source: Own remote observatory


L-RGB (synthetic luminance)
1h48 exposure time at 800 iso (Tournefeuille, France)
Newton telescop 200/1000 – 450D EOS filter removed
CLS filter (due to light pollution conditions)
Preprocessing with IRIS (Christian Buil software)
Image processing with Photoshop
Final touch with Lightroom



Olivier Ravayrol
License: None (All rights reserved)


  • NGC 7293 - The Helix Nebula (L-RGB), 


            Olivier Ravayrol
  • Final
    NGC 7293 - The Helix Nebula (L-RGB), 


            Olivier Ravayrol


Description: New pretreatment with SIRIL - New noise treatment with NoiseWare plugin

Sky plot

Sky plot


NGC 7293 - The Helix Nebula (L-RGB), 


            Olivier Ravayrol