NGC 281 - The Pacman Nebula (Greg Mason)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · LBN 611 · LBN 615 · LBN 616 · NGC 281 · Sh2-184

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NGC 281 - The Pacman Nebula

Revision title: NGC-281 The Pacman Nebula - workflow change

Powered byPixInsight

NGC 281 - The Pacman Nebula

Revision title: NGC-281 The Pacman Nebula - workflow change

PixInsight Workflow

Weighted Batch Pre-Processing:

Post-Processing:

StarAlignment
DynamicCrop
DynamicBackgroundExtraction
LinearFit
TGVDenoise
MultiScaleMedianTransform
ArcsinhStretch
ChannelCombination
⦁   R = Sii
⦁   G = Ha
⦁   B = Oiii

Non-linear RGB file.

BackgroundNeutralization
Invert Image
SCNR (Green to remove magenta from stars)
InvertImage
CurvesTransformation to adjust Hue to taste and to balance colors.

Starnet to create starless image.
PixelMath to adjust starless image (1-(1-$T)*(1-$T) )
HistogramTransformation on starless image to increase contrast

PixleMath to blend starless image with RGB (F=0.4; (1-(1-$T)*(1-s)*F)+($T*~F) )
LocalHistogramEqualization
MultiscaleLinearTransform
CurvesTransformation to adjust saturation, mask, as needed
MorphologicalTransformation for star reduction

Original
Final
B

B

Title: NGC-281 The Pacman Nebula - workflow change

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Narrowband imaging

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	8792838
PixInsight job	MIX83N1FO7QEOS32SN1UNUFYSPOYX54F
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h52m46s.984
RA (top/left)	00h48m37s.355
RA (top/right)	00h48m49s.634
RA (bottom/right)	00h56m47s.720
RA (bottom/left)	00h56m53s.540

Dec (center)	+56°37′48″.73
Dec (top/left)	+57°20′15″.29
Dec (top/right)	+55°54′35″.36
Dec (bottom/right)	+55°54′54″.20
Dec (bottom/left)	+57°20′34″.77

Image Index:

Contribution Index (beta):

NGC 281 - The Pacman Nebula

Revision title: NGC-281 The Pacman Nebula - workflow change

NGC 281 - The Pacman Nebula

Revision title: NGC-281 The Pacman Nebula - workflow change

Equipment

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Description

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Image Index:

Contribution Index (beta):

NGC 281 - The Pacman Nebula

Revision title: NGC-281 The Pacman Nebula - workflow change

NGC 281 - The Pacman Nebula

Revision title: NGC-281 The Pacman Nebula - workflow change

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

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