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Contains:  Iris Nebula, NGC 7023
NGC 7023 the Iris Nebula, 


            Scott Stefanatz
NGC 7023 the Iris Nebula
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NGC 7023 the Iris Nebula

Acquisition type: Electronically-Assisted Astronomy (EAA)

Technical card

Imaging telescopes or lenses: Orion 102mm Apochramatic refractor

Imaging cameras: ASI1600MM Pro Asi1600mm-pro

Mounts: Losmandy G11 G11

Guiding telescopes or lenses: Astromania 60mm guidescope

Guiding cameras: ZWO ASI 120 MM-S

Software: PixInsite PixInsight

Filters: ZWO 31mm Lumance ZWO Lum  ·  ZWO 31mm Green Zwo Green  ·  ZWO 31mm Blue Zwo Blue  ·  ZWO 31mm Red ZWO Red

Accessory: moonlite focuser  ·  Hotech 2" SCA Self-Centering Field Flattene Hotech SCA Field Flattner

Dates:April 20, 2020

ZWO 31mm Lumance ZWO Lum: 32x240" (gain: 132.00) -20C bin 1x1
ZWO 31mm Red ZWO Red: 26x240" (gain: 132.00) -20C bin 1x1
ZWO 31mm Blue Zwo Blue: 30x240" (gain: 132.00) -20C bin 1x1
ZWO 31mm Green Zwo Green: 36x240" (gain: 132.00) -20C bin 1x1

Integration: 8.3 hours

Darks: ~35

Flats: ~31

Bias: ~100

Avg. Moon age: 27.19 days

Avg. Moon phase: 6.07%

Bortle Dark-Sky Scale: 2.00

Mean FWHM: 4.25

Basic astrometry details job: 3444382

RA center: 21h 1' 36"

DEC center: +68° 10' 33"

Pixel scale: 1.097 arcsec/pixel

Orientation: 281.137 degrees

Field radius: 0.889 degrees

Resolution: 4656x3520

Locations: Abduction Observatory, Wheatland, Wy, United States

Data source: Backyard


The Iris Nebula NGC 7023 in Cepheus



Scott Stefanatz
License: None (All rights reserved)


  • NGC 7023 the Iris Nebula, 


            Scott Stefanatz
  • NGC 7023 the Iris Nebula, 


            Scott Stefanatz
  • Final
    NGC 7023 the Iris Nebula, 


            Scott Stefanatz


Description: RGB + L Stuart Forman Suggested process Here is a different technique that may get you a better result. Dynamic crop your L,R,G,B to crop the edges Channel combination RGB DBE or ABE on the color (alternately, you can do ABE or DBE to the R,G,B channels separately and then combine) Photometric color calibration on the RGB, (alternatively you can do Background Neutralization and Color Calibration, but I prefer PCC) Stretch the color to nonlinear. Then for your lum, do your lum processing as you would normally do it and stretch also to nonlinear. When you have both the Lum and the Color where you want it, then do LRGB combination.


Description: Stuart Forman Process but without adding the Lum data

Sky plot

Sky plot


NGC 7023 the Iris Nebula, 


            Scott Stefanatz