NGC7023 - The Iris Nebula rides the waves (Frank Rogin)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 4 Cep · 6 Cep · 7 Cep · 8 Cep) · 8 bet Cep · Alfirk · Cepheus · HD195527 · HD195937 · HD196142 · HD196229 · HD196343 · HD196970 · HD197830 · HD198236 · HD198385 · HD198511 · HD198737 · HD198781 · HD199019 · HD199660 · HD200099 · HD200775 · HD201032 · HD201636 · HD201651 · HD201817 · HD201888 · HD202142 · HD202181 · And 57 more.

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NGC7023 - The Iris Nebula rides the waves

Revision title: Really final :-)

Powered byPixInsight

NGC7023 - The Iris Nebula rides the waves

Revision title: Really final :-)

The image was the first series I took with my Canon 700Da together with the Samyang 135mm F2.0 ED UMC on the Sky-Watcher HEQ5 PRO mount while the ASI cam attached to the 80mm refractor run on the new CGX mount in parallel. The first time, I took a double shot during a night

.

The first processing of taken frames started in March 2022. Since then I have worked on it again and again and have never been satisfied with the end result. Here you can see the 28th result

of this exhausting way to bring out the dark nebulae around NGC7023 as good as possible and to put the stars in scene as well. Compared to the cooled ASI camera, raw data from an uncooled DSLR are a real challenge. Furthermore, the rather large pixel size of 4.29 µm on the Samyang leads to a strong undersampling. Actually, I'm still not really satisfied, but there are still some new raw data waiting to be processed

. So I dare to take the step to AstroBin.

I'm looking forward to your feedback.

CS
Frank

Original
B
C
Final
D

B

Title: Less noise

Description: Some more noise reduction. Finally, I created a uniform noise using NoiseGenerator.

Uploaded: ...

C

Title: reprocessed

Description: Switched NXT and stretching to non-linear. That seems to prevents blocky structures.

Uploaded: ...

D

Title: Really final :-)

Description: Changed nebula color to be in more brown tone. Moreover, reduced the bluish nebula parts around the Iris Nebula.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	7053272
PixInsight job	3FD9Q18H1LAD4MTBY6ERQVS65T3V2WBR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h00m58s.68
RA (top/left)	20h18m58s.64
RA (top/right)	20h33m18s.29
RA (bottom/right)	21h28m36s.31
RA (bottom/left)	21h43m11s.53

Dec (center)	+68°07′00″.7
Dec (top/left)	+72°40′47″.4
Dec (top/right)	+63°06′55″.7
Dec (bottom/right)	+63°06′23″.4
Dec (bottom/left)	+72°39′54″.4

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NGC7023 - The Iris Nebula rides the waves

Revision title: Really final :-)

NGC7023 - The Iris Nebula rides the waves

Revision title: Really final :-)

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NGC7023 - The Iris Nebula rides the waves

Revision title: Really final :-)

NGC7023 - The Iris Nebula rides the waves

Revision title: Really final :-)

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