Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  B355
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NGC 7000 Cygnus Wall - NB SHO, Ben Koltenbah
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NGC 7000 Cygnus Wall - NB SHO

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NGC 7000 Cygnus Wall - NB SHO, Ben Koltenbah
Powered byPixInsight

NGC 7000 Cygnus Wall - NB SHO

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Description

This is a NB image of NGC 7000, the Cygnus Wall, using the SHO palette. This is one of my first color RGB images using many of the processes in PixInsight.

This is a dramatic section of the North American Nebula in Cygnus. NGC 7000 is an extensive HII region where the emission nebula is set aglow possibly by a hot 6th magnitude star HD 199579 (not present in this image). Other sources suggest the culprit is actually Deneb. If the latter, then this nebula is about 1800 ly distant within our galaxy. This would place the entire nebula at about 100 ly in size.

The Cygnus Wall is part of the interstellar dust and gaseous rim of this nebula and is often compared to a bird with wings outspread. If Cygnus is the swan constellation, the Cygnus Wall is the swan within the North American Nebula, although it looks more like a hawk to me.

In the second revision I utilized PixelMath to remove the purple color in the stars. I also adjusted the black levels to make the image brighter. I used SCNR to remove more of the greenish tint leaving the nebular region blue rather than turquoise. I applied AutomaticBackgroundExtraction less aggressively as I thought the first image had some signal removed. I also applied noise reduction less aggressively leaving a little more chromatic noise but somewhat sharper details in the image.

I may revisit this image in the future with RGB filter data to fill in more truthful" colors for the stars.

Here is an abbreviated list of processes I used in PI to finish this image (Version B):

Per Filter Steps:

Calibration (bias, dark, flat in HA, OIII, SII)

LocalNormalization

ImageIntegration

DrizzleIntegration

Crop, Rotation, Flip

AutomaticBackgroundExtraction (Order 2)

Deconvolution

RGB Steps:

LRGBCombination (with L blank)

AutomaticBackgroundExtraction (Order 2)

MultiscaleLinearTransform (mild noise reduction)

Stretch (beginning with application of default uncoupled STF)

SCNR (green removal)

HDRMultiscaleTransform

PixelMath (removal of purple stars as seen in Original Image)

TGVDenoise (mild noise reduction)

CurvesTransformation (mild enhancement of colors)

DynamicCrop (final image presentation)

Comments

Revisions

    NGC 7000 Cygnus Wall - NB SHO, Ben Koltenbah
    Original
  • Final
    NGC 7000 Cygnus Wall - NB SHO, Ben Koltenbah
    B

B

Description: RGB Image with Violet Star Removal

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NGC 7000 Cygnus Wall - NB SHO, Ben Koltenbah

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Cloudy Nights

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Nebluae