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Contains:  Iris Nebula, NGC 7023
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Iris Nebula, 


            Steve MacDonald
Iris Nebula
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Iris Nebula

Technical card

Imaging telescopes or lenses: Sky watcher Esprit 100mm Esprit 100 Pro f/5.5

Imaging cameras: Moravian G2-8300FW G2-8300 + FW

Mounts: Skywatcher Eq6

Guiding cameras: ZWO ASI120MC ZWO

Focal reducers: Skywatcher Flattener

Software: Sequence Generator Pro, PHD2 SGP + PHD2  ·  Pixinsight

Filters: Baader G 1.25"  ·  Baader R 1.25'' CCD Filter  ·  Baader B 1.25'' CCD Filter  ·  Baader L 1.25" CCD Filter

Accessory: Pegasus Astro Focus Cube  ·  Pegasus Astro Ultima Power Box

Dates:Sept. 13, 2020Sept. 15, 2020Sept. 16, 2020

Baader B 1.25'' CCD Filter: 36x300"
Baader G 1.25": 36x300"
Baader L 1.25" CCD Filter: 108x300"
Baader R 1.25'' CCD Filter: 36x300"

Integration: 18.0 hours

Avg. Moon age: 26.97 days

Avg. Moon phase: 8.94%

Basic astrometry details job: 3861690

RA center: 21h 1' 46"

DEC center: +68° 11' 42"

Pixel scale: 2.009 arcsec/pixel

Orientation: 267.820 degrees

Field radius: 1.025 degrees

Resolution: 2920x2232

Locations: BYO, Limassol, Cyprus

Data source: Backyard


An LRGB rendition. I used PI for processing, including initial noise reduction and decon. Star removal was performed and the nebula stretched separately to enhance the dust. Saturation was also done independently to not over cook the star field before re-combing the image using pixel maths.



Steve MacDonald
License: None (All rights reserved)


  • Iris Nebula, 


            Steve MacDonald
  • Final
    Iris Nebula, 


            Steve MacDonald

Sky plot

Sky plot


Iris Nebula, 


            Steve MacDonald