Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  IC 5070  ·  NGC 6997  ·  NGC 7000  ·  North America nebula  ·  Pelican nebula  ·  The star 56Cyg  ·  The star 57Cyg
North America and Pelican Nebula (NGC7000 and IC5070), Andrew Klinger
North America and Pelican Nebula (NGC7000 and IC5070)
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North America and Pelican Nebula (NGC7000 and IC5070)

North America and Pelican Nebula (NGC7000 and IC5070), Andrew Klinger
North America and Pelican Nebula (NGC7000 and IC5070)
Powered byPixInsight

North America and Pelican Nebula (NGC7000 and IC5070)

Equipment

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Acquisition details

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Description

The North America and Pelican nebula in Cygnus are emission regions located 1500 light-years away, and 50 light-years across. The dense dusty region spanning along the lower left is known as the Cygnus Wall, where stars are likely forming within.

Equipment:

OTA: William Optics GT81 w/0.8x reducer (382mm fl at f/4.7)

Mount: Orion Sirius EQ-G (HEQ-5)

Guidescope: Orion 50mm guidescope

Guiding camera: Orion StarShoot Autoguider

Imaging camera: ZWO ASI1600MM-Cool

Software:

SGP

PHD2

CdC

PixInsight

Acquisition:

Location: Atoka, Oklahoma (Bortle 3)

Dates: 6/19/17, 6/20/17

Gain: 0 Offset: 10

Camera temp: -20C

L: 58x180"

R: 10x180"

G: 10x180"

B: 10x180"

Total integration time: 4hr 24min

60x darks

30x flats per filter

200x bias (master bias in library)

Preprocessing:

Batch PreProcessing script to generate calibrated/registered images

ImageIntegration (Linear Fit rejection for L, Percentile rejection for RGB)

DynamicCrop the masters

DBE on each master

RGB processing:

LinearFit to Red channel

ChannelCombination to combine

BackgroundNeutralization

ColorCalibration

SCNR green

TGV and MMT noise reduction (via Jon Rista's method)

HistogramTransformation x3 using a starmask to manually perform a masked stretch

CurvesTransformation w/starmask to saturate stars

CurvesTransformation using mask generated by ColorMaskScript (red channel) to saturate nebulosity

CurvesTransformation w/~starmask for contrast

MorphologicalTransformation for star reduction

SCNR green

L processing:

Deconvolution

HistogramTransformation x4 using a starmask to manually perform a masked stretch

Duplicated the image to create a starless version, using a starmask and several iterations of MMT and MT. Then pushed the faint nebulosity in the starless version using PixelMath expression: "1-(1-$T)*(1-$T)"

Combined the starless version with the image using PixelMath expression "F=0.4; (1-(1-$T)*(1-s)*F)+($T*~F)" followed by the same function but with a value of F=0.2. (s=starless photo).

HistogramTransformation to move black point

LocalHistogramEqualization with inverted starmask

CurvesTransformation for contrast

MorphologicalTransformation for star reduction

DarkStructureEnhance Script

Combined L and RGB with the script "LRVB-AIP"

CurvesTransformation to boost saturation further

SCNR green

Comments

Sky plot

Sky plot

Histogram

North America and Pelican Nebula (NGC7000 and IC5070), Andrew Klinger