IC5146 - The Cocoon Nebula

Emission/Dark Nebula in Cygnus

Uploaded 9/11/05

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 There are two deep sky objects in this image: the Cocoon nebula in the center, and the galaxy MAC2154+4707 located just below the very bright star on the lower left. The Cocoon nebula is a mix of pink emission nebulosity and blue reflection illuminated by the star cluster seen here in its core. It is more than 10 arcminutes in size, my field here is 30 minutes wide. Inside you can see dark nebula superimposed on the pink part but no Bok globules making stars.

Equally interesting is the nearly edge on spiral seen at the lower left. Very dim at 17.0 magnitude, it is .7 x .1 minutes in size (yes that's 6 arcseconds wide) and yellowed by interstellar extinction which is quite a lot in this part of the sky.

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: LRGB = 60:20:20:20 (RGB Binned 2x2) RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 4.3 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 60 F CCD Temperature: -30 C Processing Tools: Maxim DL, Photoshop, PixInsight, CCDOps Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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