Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Iris Nebula, NGC 7023
Getting plate-solving status, please wait...
Iris Nebula (Caldwell 4), 


            Henning Schmidt
Iris Nebula (Caldwell 4)
Powered byPixInsight

Iris Nebula (Caldwell 4)

Technical card

Dates:Aug. 15, 2015

Frames: 85x120" ISO6400 -15C

Integration: 2.8 hours

Darks: ~100

Bias: ~200

Avg. Moon age: 0.80 days

Avg. Moon phase: 0.72%

Basic astrometry details job: 3332790

RA center: 20h 59' 50"

DEC center: +68° 6' 32"

Pixel scale: 2.155 arcsec/pixel

Orientation: 92.637 degrees

Field radius: 1.845 degrees

Resolution: 5124x3426

Locations: Home observatory, Rostock, Mecklenburg-Vorpommern, Germany

Data source: Backyard


Iris Nebula (Caldwell 4, NGC 7023) on 15.08.2015; 85 frames at 120 sec, ISO 6400, camera: Canon EOS 700Da cooled -15°C, objektive: Skywatcher Esprit-80ED.



Henning Schmidt
License: None (All rights reserved)

Sky plot

Sky plot


Iris Nebula (Caldwell 4), 


            Henning Schmidt