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:  NGC 7023
Getting plate-solving status, please wait...
The Iris Nebula, NGC 7023, Caldwell 4, 


            Steven Bellavia
The Iris Nebula, NGC 7023, Caldwell 4

The Iris Nebula, NGC 7023, Caldwell 4

Technical card

Resolution: 5350x3550

Dates:Aug. 24, 2019Aug. 25, 2019

IDAS UIBAR-III: 27x300" (gain: 100.00) -15C bin 1x1
IDAS UIBAR-III: 43x120" (gain: 50.00) -15C bin 1x1

Integration: 3.7 hours

Darks: ~25

Flats: ~30

Flat darks: ~30

Avg. Moon age: 23.51 days

Avg. Moon phase: 35.81%

Bortle Dark-Sky Scale: 2.00

Mean SQM: 21.60

Temperature: 10.00 job: 2900867

RA center: 21h 1' 34"

DEC center: +67° 42' 14"

Pixel scale: 1.360 arcsec/pixel

Orientation: 93.857 degrees

Field radius: 1.212

Data source: Traveller


The iris nebula, NGC 7023, Caldwell 4, and surrounding interstellar dust clouds including LBN 487 and LBN 475.
The Iris nebula is a bright reflection nebula 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.



Steven Bellavia
License: None (All rights reserved)

Sky plot

Sky plot


The Iris Nebula, NGC 7023, Caldwell 4, 


            Steven Bellavia