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Contains:  NGC 7023
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NGC7023 - Iris Nebula, 


            Simon Todd
NGC7023 - Iris Nebula

NGC7023 - Iris Nebula

Technical card

Resolution: 3325x2488

Dates:Aug. 8, 2016Aug. 10, 2016Aug. 12, 2016

Baader Blue 36mm: 12x300" -20C bin 1x1
Baader Green 36mm: 13x300" -20C bin 1x1
Baader Luminance 36mm: 19x300" -20C bin 1x1
Baader Red 36mm: 13x300" -20C bin 1x1

Integration: 4.8 hours

Darks: ~25

Flats: ~25

Avg. Moon age: 7.16 days

Avg. Moon phase: 47.75% job: 1402916

RA center: 21h 1' 35"

DEC center: +68° 10' 1"

Pixel scale: 1.390 arcsec/pixel

Orientation: -90.453 degrees

Field radius: 0.802

Data source: Backyard


The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158.[1] It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across

This is my first attempt at this object since I have been imaging, and it is the first subject with my new Quattro 8-CF F4



Simon Todd
License: None (All rights reserved)


  • NGC7023 - Iris Nebula, 


            Simon Todd
  • NGC7023 - Iris Nebula, 


            Simon Todd
  • Final
    NGC7023 - Iris Nebula, 


            Simon Todd

Sky plot

Sky plot


NGC7023 - Iris Nebula, 


            Simon Todd