Hemisphere:  Northern
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Sh2-112 • Emission Nebula in HOO, 


            Douglas J Struble
Sh2-112 • Emission Nebula in HOO
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Sh2-112 • Emission Nebula in HOO

Technical card

Imaging telescopes or lenses: Explore Scientific ED165CF FPL-53

Imaging cameras: ZWO ASI1600MM-PRO

Mounts: Astro-Physics Mach 1 GTO

Guiding telescopes or lenses: Orion 80mm Short Tube

Guiding cameras: Starlight Xpress Lodestar x2

Software: Photoshop CC  ·  PHD2  ·  Sequence Generator Pro  ·  PixInsight  ·  SkySafari Pro

Filters: Astronomik Ha 6nm 1.25''  ·  Astrodon OIII 3nm

Accessory: ZWO 8x 1.25" Filter Wheel (EFW)  ·  QHYCCD PoleMaster  ·  Hotech 2" SCA Self-Centering Field Flattener  ·  MoonLite CFL 2.5" Large Format Focuser

Dates:July 18, 2020July 30, 2020

Astrodon OIII 3nm: 271x120" (gain: 200.00) -20C bin 1x1
Astronomik Ha 6nm 1.25'': 299x120" (gain: 200.00) -20C bin 1x1

Integration: 19.0 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 18.90 days

Avg. Moon phase: 43.43%

Bortle Dark-Sky Scale: 8.00

Basic astrometry details

Astrometry.net job: 4104562

RA center: 20h 34' 7"

DEC center: +45° 35' 9"

Pixel scale: 0.679 arcsec/pixel

Orientation: 103.342 degrees

Field radius: 0.359 degrees

Resolution: 3007x2339

Data source: Backyard


Sh2-112 lies about 5.600 light years from Earth in Cygnus, the Swan It’s not far from the North America Nebula, but twice as far away. This whole area of Cygnus is dominated by the Milky Way and is awash in faint nebulosity, as can be seen in this image. The nebula is illuminated by BD+45 3216, the bright star at its center, which is about 30x the size of the Sun. This nebula does not seem to be a particularly popular imaging target, though I am not sure why. It is quite beautiful.

This is a HOO version I previously did in a SHO version this past July. While the nebulosity is in HOO, the stars are in SHO and color shifted to a more natural palette.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


Sh2-112 • Emission Nebula in HOO, 


            Douglas J Struble

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Sharpless2 Objects