wide field North America and Pelican nebula with stock DSLR, no guiding (Gernot Schreider)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 55 Cyg · 56 Cyg · 57 Cyg · 58 nu. Cyg · 59 f01 Cyg · 60 Cyg · 62 ksi Cyg · 63 f02 Cyg · B349 · B350 · B351 · B352 · B353 · B355 · B356 · B358 · B361 · IC 1369 · IC 5068 · IC 5070 · IC 5076 · LBN 308 · LBN 311 · LBN 318 · LBN 319 · LBN 320 · LBN 327 · LBN 328 · LBN 329 · LBN 332 · And 81 more.

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wide field North America and Pelican nebula with stock DSLR, no guiding

Powered byPixInsight

wide field North America and Pelican nebula with stock DSLR, no guiding

Educating myself in PixInsight, I re-used my data of NGC 7000 from three nights and combined them to 3hrs of data. The initial result already looked promising. I then did investigate a lot how to deconvolute stars, which was a challenge as there are so many tiny stars.

Finally I did a decomposition with StarNet and did a modest editing on the starless data and run a Morphological Transformation on the stars of medium size on the star mask generated, which seemed to be easier and more efficient than any method to reduce the star size with the background in place. Then I recombined the pictures with PixelMath. This approach resulted in something I preferred over other approaches, which I tried.

MT did do the job but also created some small scale artifacts, some remnant structures which are showing if you look closely. This effect is not something I do like but comparing to another approach, where all the stars including the tiniest ones were even more accentuated I decided to go for this approach, as it puts more emphasis on the nebula.

Compared to other cameras which are IR sensitive this result lacks the 'red', which itself is a artifical visualisation of the IR but I think the overall colors resemble quite ok the natural look.

I am quite happy with the result considering the limited data quality from three unguided sessions.

Average eccentricity was 0.48, avg FWHM 4.18 px.

I guess I need to use guiding to reduce FWHM.

Comments are most welcome.

CS

Gernot

Camera Lens Astrophotography
Astrophotography Germany
PixInsight Addicts

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Status	Advanced success
Started	...
Astrometry.net job	4187530
PixInsight job	4T5TPHW8WZ6VZLXTXMLRTKMSU50XQ9ZQ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h00m10s.26
RA (top/left)	20h46m27s.96
RA (top/right)	20h46m23s.18
RA (bottom/right)	21h11m51s.57
RA (bottom/left)	21h16m11s.54

Dec (center)	+44°04′55″.3
Dec (top/left)	+48°47′32″.2
Dec (top/right)	+39°28′17″.1
Dec (bottom/right)	+39°17′14″.2
Dec (bottom/left)	+48°33′10″.8

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wide field North America and Pelican nebula with stock DSLR, no guiding

wide field North America and Pelican nebula with stock DSLR, no guiding

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wide field North America and Pelican nebula with stock DSLR, no guiding

wide field North America and Pelican nebula with stock DSLR, no guiding

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