Horsehead Nebula - Cropped (Greg Mason)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Flame Nebula · Horsehead nebula · IC 434 · LBN 953 · LBN 954 · Orion B · Sh2-277

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Horsehead Nebula - Cropped

Powered byPixInsight

Horsehead Nebula - Cropped

PixInsight Workflow

Pre-Processing:

Master Super Bias from library.
Master Dark from library.
Master Flats per set from Super Bias and Master Dark Flat from library.

ImageCalibration
CosmeticCorrection
SubframeSelector (Weight, choose reference files and approve)
StarAlignment (Generate Drizzle Data)
LocalNormalization
ImageIntegration (Modify Drizzle Data)
DrizzleIntegration

Now have individual, unstretched Ha, Sii and Oiii files.

Post-Processing:

StarAlignment
DynamicCrop
DynamicBackgroundExtraction
LinearFit
TGVDenoise
MultiScaleMedianTransform
ArcsinhStretch
ChannelCombination (Ha - Red, Sii - Green, Oiii - Blue)

Now working with stretch RGB file.

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

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

Texas Astronomy
Narrowband imaging
ZWO ASI1600MM/QHY163M

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	9107018
PixInsight job	AYT3MAOROVM7CPUSR327TOIG8321MKH8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h40m50s.996
RA (top/left)	05h40m09s.642
RA (top/right)	05h40m07s.763
RA (bottom/right)	05h41m32s.368
RA (bottom/left)	05h41m34s.251

Dec (center)	-02°27′00″.34
Dec (top/left)	-02°13′26″.68
Dec (top/right)	-02°40′10″.93
Dec (bottom/right)	-02°40′33″.35
Dec (bottom/left)	-02°13′49″.50

Image Index:

Contribution Index (beta):

Horsehead Nebula - Cropped

Horsehead Nebula - Cropped

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Image Index:

Contribution Index (beta):

Horsehead Nebula - Cropped

Horsehead Nebula - Cropped

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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