Sh2
112 (Sharpless 112) Nebula in Cygnus -
H-Alpha, OIII, OIII as RGB with true RGB overlaid
Click here to see an alternate approach: Sh2 112 RGB
enhanced with H-Alpha and OIII
Click on the image to see it 2x this big (which is 50% of the full rez)
Here is the Pure RGB:
And here is the H-Alpha Channel
[from Wikipedia:
Sh2 -112 is an emission nebula in the constellation Cygnus. It is
located in the northern part of the constellation, about 1.5 ° to WNW
of the bright star Deneb. It is a circular H II region of apparent
dimensions of about 15 ', crossed by a dark band on its western side
oriented north-south. The star responsible for its excitation is
believed to be BD + 45 3216, a double blue star of spectral class O8V
and an apparent magnitude of 9.18. Estimates on the distance of this
star provide a value of 1740 parsecs (about 5670 light years
), which would place Sh2-112 in a particularly rich region of
the Orion Arm and physically very close to the great nebulous system of
Cygnus X. The nebula is located in a star- forming region
which also includes some sources of radio waves and the
molecular cloud [DBY94] 29, which has a mass of 1880 M ⊙ ;
however in a 1994 study a distance of 2100 parsecs is reported for this
last cloud.
Camera: Apogee U16M (16803) w Astrodon Gen II filters
Scope: Planewave 12.5" CDK
RGB 15/18/15 x 10 minutes
H-Alpha / OIII 14 / 18 x 20 min
Paramount ME guided with an ST402ME and Astrodon MMOAG
TSX and CCD-Commander
All calibration and initial processing through to the RGB and separate
NB frames in PixInsight
Subsequent assembly of final image in Photoshop CC
Click on the image to see it 2x in size or to have your browser resize
it for your screen.
Captured March/April 2022
Lucknow, Ontario
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