Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7023
Iris Nebula NGC 7023 (Caldwell 4), 


            Jeff Clayton
Iris Nebula NGC 7023 (Caldwell 4)
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Iris Nebula NGC 7023 (Caldwell 4)

Technical card

Imaging telescopes or lenses: Orion USA ED80T CF

Imaging cameras: QHY8L OSC

Guiding cameras: Orion Starshoot Auto-Guider

Focal reducers: Orion Field Flattener for Small Refractors

Software: FITS LIBERATOR  ·  Straton  ·  Nebulosity 3.1  ·  EZCap  ·  Photo Shop

Accessory: Orion Mini 50mm Guide Scope with Helical focuser mini 50mm guide scope

Dates:Sept. 11, 2015

Frames: 12x600"

Integration: 2.0 hours

Avg. Moon age: 27.93 days

Avg. Moon phase: 2.89%

Basic astrometry details

Astrometry.net job: 773503

RA center: 21h 0' 38"

DEC center: +68° 8' 31"

Pixel scale: 3.359 arcsec/pixel

Orientation: 84.016 degrees

Field radius: 1.288 degrees

Resolution: 620x386


One of my favorites. Excellent example of a reflection nebula


Sky plot

Sky plot


Iris Nebula NGC 7023 (Caldwell 4), 


            Jeff Clayton