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Contains:  NGC 7023
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Iris Nebula, 


            Radek Kaczorek
Iris Nebula

Iris Nebula

Technical card

Resolution: 1600x1200

Dates:Aug. 13, 2017Aug. 14, 2017Aug. 15, 2017

Baader UHC-S UHC-S/L-Booster Filter: 48x300" -5C bin 1x1
ZWO blue: 20x180" -5C bin 2x2
ZWO green: 20x180" -5C bin 2x2
ZWO red: 20x180" -5C bin 2x2

Integration: 7.0 hours

Darks: ~20

Flats: ~35

Bias: ~20

Avg. Moon age: 21.56 days

Avg. Moon phase: 56.13% job: 1691409

RA center: 315.411 degrees

DEC center: 68.177 degrees

Pixel scale: 2.084 arcsec/pixel

Orientation: -179.936 degrees

Field radius: 0.579 degrees

Locations: Penthouse Observatory, Warsaw, Poland

Data source: Backyard


Iris nebula in LRGB taken from heavily light polluted area in Warsaw, Poland. I accepted the challenge to depict this popular object in LRGB as a proof of concept for city-based astrophotography. Yes, you can do this.



Radek Kaczorek
License: Attribution-NonCommercial-ShareAlike Creative Commons

Sky plot

Sky plot


Iris Nebula, 


            Radek Kaczorek

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