Cocoon Nebula, a LRGB test picture (Niels V. Christensen)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon nebula · IC 5146 · LBN 424 · LDN 1055 · Sh2-125 · VdB147

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Cocoon Nebula, a LRGB test picture

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Cocoon Nebula, a LRGB test picture

While I waited for the Giacobinni-Zinner Comet to raise higher in the sky I took some LRGB test frames of the Cocoon Nebula.

Typically I have to wait app. one hour to get stars FWHM value down to an acceptable level, and in that time I also struggle to find the optimal focus point.

Total LRGB exposure time for this test picture was: 10x120sec, 9x120sec, 7x120sec, 8x120sec.

All frames were calibrated with darks and flat frames before registred and normalized.

During the session/night, I had four nearby street lamps covered.

My home build observatory is placed in my front yard/in the "red light" polution zone, have a look here,

Red Zone

FYI, several years ago I also tried to take this object,

https://astrob.in/229301/B/

Kind regards Niels

Original
B
Final
C

B

Description: Increased the saturation. Tried to improve the stars. Minor level adjustment. CS Niels

Uploaded: ...

C

Description: Made a "mobile display" version. It was edited in my S6 mobile phone. I haven't checked this image revision on a PC 😊

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	2893599
PixInsight job	1LQFMLI6XEBVC8NVDISRC54ER4IG6L1H
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h53m43s.60
RA (top/left)	21h52m29s.14
RA (top/right)	21h54m20s.84
RA (bottom/right)	21h54m57s.22
RA (bottom/left)	21h53m04s.81

Dec (center)	+47°15′52″.5
Dec (top/left)	+47°12′49″.7
Dec (top/right)	+47°04′41″.2
Dec (bottom/right)	+47°18′52″.0
Dec (bottom/left)	+47°27′03″.6

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Cocoon Nebula, a LRGB test picture

Cocoon Nebula, a LRGB test picture

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Cocoon Nebula, a LRGB test picture

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