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Rare Sh2-104 Emission Nebula in SHO, 


            Douglas J Struble
Rare Sh2-104 Emission Nebula in SHO

Rare Sh2-104 Emission Nebula in SHO

Technical card

Resolution: 3344x4182

Dates:July 9, 2019July 11, 2019July 13, 2019

Astrodon Ha 5nm: 216x120" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm: 351x120" (gain: 200.00) -20C bin 1x1
Astrodon SII 3nm: 248x120" (gain: 200.00) -20C bin 1x1

Integration: 27.2 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 9.49 days

Avg. Moon phase: 70.33%

Bortle Dark-Sky Scale: 7.00 job: 3251637

RA center: 20h 17' 37"

DEC center: +36° 39' 7"

Pixel scale: 0.648 arcsec/pixel

Orientation: 45.039 degrees

Field radius: 0.482

Locations: Backyard White Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


I originally captured this back in July. Since then, I have changed my processing regiment a lot and wanted to reprocess it from the ground up. I am much happier with it now.

Sh2-104, also cataloged as DWB 14, is about 14,000 light years away toward the Cygnus constellation.

Seldom imaged by amateur astronomers, this is a very faint emission nebula in the constellation Cygnus. This is located due east of the popular Crescent Nebula. Sh-104 is viewed by professional astronomers as a good illustration of the "collect and collapse" model of star formation triggered by the rapid expansion of a Helium II region.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


Rare Sh2-104 Emission Nebula in SHO, 


            Douglas J Struble