NGC 7000 - North America fashion Nebula

An emission nebula located in the constellation Cygnus, known as NGC 7000 - North America Nebula. This part of the sky covers an region more than 10 times the area of the full moon but, due to its low surface brightness it can not be seen with the naked eye.

Imaged in a classic SHO palette. Imaged over 3 nights June 17-19, 2021 for a total of 11.4 hours exposure time, with another 4-6 for calibrating, stacking and editing.

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Imaging telescopes or lenses: TPO 6" imaging Newtonian f/4

Imaging cameras: ZWO ASI1600MM Pro

Mounts: Orion Sirius EQ-G GoTo Mount

Guiding telescopes or lenses: TPO 6" imaging Newtonian f/4

Guiding cameras: ZWO ASI120mm-Mini

Software: Adobe Photoshop 2020 · PHD2 phd 2 · Fabien Chéreau Stellarium · Incanus Ltd. Astrophotograhy Tool · PixInsight

Filters: Antlia SII 3nm Pro 1.25" · Antlia Ha 3nm Pro 1.25" · Antlia OIII 3.5nm 1.25"

Accessory: ZWO EAF Electronic Auto Focuser · ZWO EFW 31mm 8 positions · Skywatcher Quattro Coma Corrector · ZWO OAG Helical Focuser

Dates: June 17, 2021 , June 18, 2021 , June 19, 2021

Frames:

Antlia Ha 3nm Pro 1.25": fashion 66x240" (4h 24') (gain: 139.00) -15C bin 1x1

Antlia OIII 3.5nm 1.25": 56x300" (4h 40') (gain: 75.00) -15C bin 1x1

Antlia SII 3nm Pro 1.25": 24x300" (2h) (gain: 139.00) -15C bin 1x1

Integration: 11h 4'

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 7.74 days

Avg. Moon phase: 53.75%

Bortle Dark-Sky Scale: 9.00

Mean SQM: 17.79

Processing

ImageCalibration to all light frames with corresponding master darks and flats.

CosmeticCorrection to remove hot and cold pixels on all filters

SubframeSelector to apply weights to each image on all filters

StarAlignment on best Ha subframe

ImageIntegration with top 12 best graded Ha subframes to create low noise master alignment reference image

StarAlignment again, but this time with low noise master alignment reference image on all filters

ImageIntegration

DynamicCrop each filter

DynamicBackgroundExtraction each filter

Create duplicate Ha

MaskedStretch on duplicate Ha

StarNet on duplicate Ha to create star mask

EZDecon on Ha using star mask from duplicate Ha

EZSoftStretch on all filters

HDRMT on Ha

LocalHistogramEqualization lightly used on Ha/Oiii

PixelMath to combine .7*Sii + .3*Ha for R, Ha for G, Oiii for B

LRGBcombine

Colormasks

RangeMask

PixelMath to combine Range mask and star mask

Lots of CurvesTransformations

DarkStructureEnhance

Save as 16-bit TIFF

Open photoshop

Camera Raw filter Color mixer to reduce magentas

Topaz Denoise AI

Annotate

Save duplicate as JPG

Stacked and processed in Pixinsight and finished in photoshop