Trifid Nebula (Thomas Fuchs)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · HD164294 · HD164384 · HD164452 · HD164492 · HD164514 · HD164534 · HD164704 · HD164833 · HD313596 · HD313597 · HD313598 · HD313606 · HD313607 · HD313608 · HD313710 · HD313713 · HD313714 · HD313715 · HD313716 · HD313718 · HD313731 · HD313734 · HD313735 · HD313736 · HD313737 · HD313739 · HD313740 · LBN 27 · M 20 · And 3 more.

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Trifid Nebula

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Trifid Nebula

Processing for each mono channel:
- Drizzle 2x integration
- DynamicBackgroundExtraction
- PSFImage
- StarNet2 (linear/create star mask)
- Deconvolution on starless image
- Recombine with stars
- NoiseXTerminator
- GeneralizedHyperbolicStretch
- HDRMultiscaleTransform
- LocalHistogramEqualization
- HistogramTransformation

Further processing:
- Combine channels with PixelMath (Ha, Oiii, Oii x 0.5 + Sii x 0.5)
- SCNR green (not fully)
- Invert and SCNR green (not fully)
- StarXTerminator (unscreen stars)
- Export starless and stars as 16-bit TIF

Photoshop:
- Minimize filter on stars to reduce star sizes
- Curves on stars to deemphasize
- Camera Raw on starless for color and contrast
- Camera Raw on stars to remove color fringing (introduced by narrowband combination as stars are bigger in some channels)
- Layer stars (screen) on top of starless
- Further noise reduction and sharpening on starless layer
- Resize to 45% (to bring it down to the range of the theoretical telescope resolution)

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	6130117
PixInsight job	1JQ088MUYI5H075L5FFV8DJ197C635WI
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m32s.57
RA (top/left)	18h02m15s.73
RA (top/right)	18h01m03s.66
RA (bottom/right)	18h02m49s.58
RA (bottom/left)	18h04m01s.33

Dec (center)	-23°00′24″.5
Dec (top/left)	-22°37′59″.2
Dec (top/right)	-23°10′28″.4
Dec (bottom/right)	-23°22′53″.4
Dec (bottom/left)	-22°50′18″.8

Image Index:

Contribution Index (beta):

Trifid Nebula

Trifid Nebula

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Acquisition details

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Comments

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Image Index:

Contribution Index (beta):

Trifid Nebula

Trifid Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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