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Contains:  NGC 7023
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NGC7023 Iris Nebula-wide field, 


            Jerry Macon
NGC7023 Iris Nebula-wide field
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NGC7023 Iris Nebula-wide field

Technical card

Dates:Sept. 9, 2018

Frames:Astronomik UV-IR Block L-2 2": 88x240" (gain: 75.00) -5C bin 1x1

Integration: 5.9 hours

Avg. Moon age: 29.26 days

Avg. Moon phase: 0.08%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details job: 2312336

RA center: 21h 2' 25"

DEC center: +68° 0' 57"

Pixel scale: 1.815 arcsec/pixel

Orientation: 91.370 degrees

Field radius: 1.829 degrees

Resolution: 6032x4032

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Imaged on nights of 9/9/2018, 9/10/2018, 9/15/2018.
The ASI128MC uses the same sensor as the full frame Nikon D600. This produces a 2x3 degree field of view on the NP127is.
The Iris Nebula, also known as 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. 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.



Jerry Macon
License: Attribution Creative Commons

Sky plot

Sky plot


NGC7023 Iris Nebula-wide field, 


            Jerry Macon