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NGC 7023, Iris Nebula

Object : NGC 7023, Iris Nebula
Coordinates/Direction : RA: 21h01m, DEC: +68o10'
Object size : 18'x18'
Object magnitude : 6.8
More to know : Wikipedia: wiki/ Iris Nebula

NGC 7023 Nebula 2023-04-01 and 2023-04-10

NGC 7023 Nebula, 2023 (Click on image and get a full resolution image in a new window)
Date : 2023-04-01 and 2023-04-10
Time (UT) : -
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5 degree, before cropping
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 30x30 seconds and 120x60 seconds, iso1600
Image process tool : Siril, Gimp, Irfanview
Processing : Calibrated dark, flat and color
Weather : clear
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : When the season come close to the end it's in hurry to find more objects to take photographs of. This is the NGC 7023 nebula, even called Iris Nebula. It's a bright reflection nebula. The angle size of it is almost as the Moon, but still with a 300 mm lens it will be small. See the bright dot in center.

Crop around the central area

NGC 2023 Nebula, 2022
Date : 2023-04-01 and 2023-04-10
Time (UT) : -
Field (FOV) : Cropped to 1x1 degree
Comment : Even when I collect exposures from two different nights and sum up the nebula is weak. A total exposure of135 minutes. The biggest problem when photographing nebulas is that you must have a dark sky or narrow band filters. That wasn't the case this time. Note how the surrounding of the nebula doesn't have many stars. The nebula is much bigger than the bright part, the empty area are where the nebula block the stars behind.
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