Spider Nebula, or the Great Space Shroom (Aaron Freimark)

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: 24 Aur · 24 phi Aur · HD243840 · HD243871 · HD35633 · HD35742 · IC 417 · LBN 804 · LDN 1526 · Sh2-234 · The star φ Aur

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Spider Nebula, or the Great Space Shroom

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Spider Nebula, or the Great Space Shroom

I captured this last week, and did a quick processing, but I was pretty unhappy with how it turned out. Tonight, inspired by Russell Croman's BlurXTerminator, I re-procesed the data. What a difference!

Preprocessing

Weighted Batch Preprocessing, with 2x Drizzle

RGB

LinearFit R & B to G
ChannelCombination
BlurXTerminator
DynamicBackgroundExtraction
Spectrophotmetric Color Calibration
ArcsinhStretch
StarXTerminator (keep stars, remove background)
Morphological Transformation (erode)
Histogram Transformation to make brighter
Morphological Transformation (erode) again

Ha & SII

BlurXTerminator (Ha only; it failed on SII)
ArcsinhStretch
StarXTerminator to remove stars
ArcsinhStretch again
CurvesTransformation
ChannelCombination (Ha / SII / SII)
LRGBCombination to apply Ha as Luminance
CurvesTranformation (mostly "a")
SCNR
Export to TIFF
Topaz Denoise AI
PixelMath to apply stars ~(~stars * ~$T)
Export to TIFF again
Photoshop to slightly touch up color balance

Mid-Hudson Astronomical Association (MHAA)
Northeast Imagers

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	6769318
PixInsight job	T7F5W4U50ED7G772NMPWF5ZZ8XJ52H7G
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h28m28s.564
RA (top/left)	05h28m00s.877
RA (top/right)	05h26m56s.139
RA (bottom/right)	05h28m55s.956
RA (bottom/left)	05h30m01s.415

Dec (center)	+34°24′02″.92
Dec (top/left)	+34°47′29″.96
Dec (top/right)	+34°09′12″.33
Dec (bottom/right)	+34°00′34″.37
Dec (bottom/left)	+34°38′47″.24

Image Index:

Contribution Index (beta):

Spider Nebula, or the Great Space Shroom

Spider Nebula, or the Great Space Shroom

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Image Index:

Contribution Index (beta):

Spider Nebula, or the Great Space Shroom

Spider Nebula, or the Great Space Shroom

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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