Sh2-106 in Cygnus

Sh2-106 in Cygnus

Emission Nebula

Constellation: Cygnus
Ra: 20h 27m 52s
Dec: +37d 26m 13s
Distance: 1,900 light years
Image Size: 36' x 24'
North: Up

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Description

Sharpless 2-106 lies between Sadr and the Veil SNR in Cygnus. At first glance, it appears like a bipolar planetary nebula. That is what attracted my attention. However, it is not a PN. It is an emssion nebula. 600 pc distant and quite small at 0.5 pc long (~2000 and 1.6 light-years, respectively), and is ionized by an O8 star, S106IR. More details can be found here based upon radio data.
2 hours of NIR-blocked Luminance and 70 min of each R,G,B, augmented with 90 min of H-a and 90 min of OIII using Astrodon filters. The upper circular object is deficient in OIII, most of which is concentrated in the bright portion of the lower object. There is considerable surrounding nebulosity, as expected in Cygnus near Sadr. The deep luminance show a large circular region centered around the object with less emssion than the surrounding areas. You can see a bit of this arc in the colored version above.
An expanded image of the object is shown below:

Exposure: 6.8 hrs H-a, OIII, LRGB
Telescope: RCOS 16" RC f/8.9 tube
Mount: Software Bisque Paramount ME
Oag: Astrodon MonsterMOAG
Acquisition: CCD AutoPilot3
Calibration: CCDStack
Observatory Site: Sierra-Remote Observatories, Shaver Lake, CA
Camera: SBIG STL11000
Filters: Astrodon 6 nm H-a, OIII Gen 1 RGB
Guider: SBIG STL Remote
Camera Operation: MaximDL4.62
Processing: Photoshop CS2
Image Date: 08/18/2007

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