IC 5146 - Cocoon Nebula (Daniel.P)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon nebula · IC 5146 · Sh2-125 · VdB147

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IC 5146 - Cocoon Nebula

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IC 5146 - Cocoon Nebula

I have added the version C which resulted from a tentative color enhancement in PI with the PixelMath tool. I found the result interesting despite artificial. If you have an opinion on the result, please tell me.

All the data from the 16 of august were lost due to focus problem. I made a good initial focus, but just before leaving the equipment to operate on its own, I adjusted (increase) dew preventing resistor. I think it change the length of the optical tube of the 8" telescope ... at least I learn something from this ... and it help me deciede to go to auto focus later.

The average FWHM is 2.2 arcsec (before deconvolution) measured in PI.

Pre-processing done in Pixinsight :

- overscan area offset correction

- bias correction

- flat correction

- hot pixel correction

- debayer

- registration

- stack

Processing done in Pixinsight :

- backgroung color neutralisation

- color calibration

- residual sky background substraction

- deconvolution

- non linear image creation

- color saturation boost with masked bkg

Final image :

- jpeg calibration done in Mac Photo

Original
Final
B
C

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Status	Advanced success
Started	...
Astrometry.net job	969580
PixInsight job	TG90A3J6XGE0IBE9P0W1VIAOSXGZMPK5
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h53m31s.993
RA (top/left)	21h52m27s.720
RA (top/right)	21h52m06s.169
RA (bottom/right)	21h54m35s.444
RA (bottom/left)	21h54m58s.903

Dec (center)	+47°14′14″.69
Dec (top/left)	+47°34′36″.87
Dec (top/right)	+46°56′20″.75
Dec (bottom/right)	+46°53′50″.74
Dec (bottom/left)	+47°32′04″.47

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IC 5146 - Cocoon Nebula

IC 5146 - Cocoon Nebula

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IC 5146 - Cocoon Nebula

IC 5146 - Cocoon Nebula

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