NGC 7000 - North America Nebula (Steve Ludwig)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 50 alf Cyg · 55 Cyg · 56 Cyg · 57 Cyg · 58 nu. Cyg · 59 f01 Cyg · 60 Cyg · 62 ksi Cyg · 63 f02 Cyg · B347 · B348 · B349 · B350 · B351 · B352 · B353 · B355 · B356 · B358 · Cygnus · Deneb · IC 5068 · IC 5070 · IC 5076 · NGC 6991 · NGC 6996 · NGC 6997 · NGC 7000 · NGC 7026 · NGC 7039 · And 23 more.

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NGC 7000 - North America Nebula

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NGC 7000 - North America Nebula

Equipment

- Nikon D3300 (unmodified)

- Samyang 135mm f2 @ f2

- Skywatcher Star Adventurer Pro Pack

- no-name tripod

Acquisition

- 108 lights x 120 s = 3 h 36 min total exposure time

- no dark, flat, bias frames

- no filters

- ISO 200

- Bortle 4 zone

Processing

-> lights stacked in DSS

-> median kappa sigma clipping method

-> unmodified TIF opened in PixInsight

-> STF stretch

-> dynamic background extraction

-> background neutralization

-> color calibration

-> use of starnet++ to separate background from stars

-> individual histogram/curves transformation & SCNR (green) for stars and background

-> pixel math to recombine both images

-> ACDNR

-> dynamic crop

-> histogram/curves transformation -> saved as jpg

Original
Final
D

D

Description: For the new revision I added the following processing steps:
1.) Separation of stars and background with Starnet++ module.
2.) Local histogram equalization on background to enhance contrast.
3.) Curves transformation to increase saturation.
4.) Resample 50% to remove noise and artifacts in bright star halos.
5.) Dynamic crop to remove artifacts at the right edge of the image (introduced by LHE process). ---

I think the changes bring out some further details in the nebulosity and the color looks a bit more vivid without being too extreme. If you like, please let me know what you think about it.

Uploaded: ...

Samyang 135 f/2
Camera Lens Astrophotography
PixInsight Addicts
/r/astrophotography
Sky-Watcher Star Adventurer

Deep Space Objects

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	4080913
PixInsight job	JR3XHRAL2909AJ30UBALWGO7B2ZNDH93
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h50m25s.0
RA (top/left)	20h44m45s.7
RA (top/right)	20h25m44s.2
RA (bottom/right)	20h55m03s.7
RA (bottom/left)	21h18m07s.8

Dec (center)	+43°34′26″
Dec (top/left)	+49°23′24″
Dec (top/right)	+39°52′49″
Dec (bottom/right)	+37°44′15″
Dec (bottom/left)	+46°53′03″

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NGC 7000 - North America Nebula

NGC 7000 - North America Nebula

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NGC 7000 - North America Nebula

NGC 7000 - North America Nebula

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