M20, Trifid Nebulae, LRGB (AnaTa)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · HD164384 · HD164402 · HD164492 · HD164514 · HD164637 · HD164704 · HD164717 · HD164739 · HD164833 · HD164864 · LBN 27 · M 20 · NGC 6514 · Sh2-30 · Trifid Nebula

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M20, Trifid Nebulae, LRGB

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M20, Trifid Nebulae, LRGB

This is LRGB image was generated in bortle 7 for RGB and bortle 3 for Lum.

Processing:
RGB are combined.
Cropping for Lum and RGB
DBE for Lum and RGB
Color Colib for RGB
Blur and Noise XT for Lum and RGB
Manual stretching (with HT) for Lum and RGB
Star XT for RGB. These stars have been kept.
Combined RGB with Lum for LRGB.
Noise XT again
Stretching again
Star XT. These stars have been discarded.

Simple Lum mask for LRGB
Local Histogram Equalization: Kernel radius of 40 and 150. Contrast 1.5.
Multiscale-median transform for sharpness. Setting is high: 0.3.
Curves: saturation and brightness are manipulated
Mask off.
Saturated and reduced RGB stars are added to this RGB image.
Done

Original
Final
B

Messier Objects

Messier Catalog

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	8376433
PixInsight job	QKY0UI7HNILMD6MMTSE67F9XCDYJZOVZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m43s.507
RA (top/left)	18h04m19s.342
RA (top/right)	18h01m08s.873
RA (bottom/right)	18h01m07s.159
RA (bottom/left)	18h04m18s.652

Dec (center)	-22°57′57″.60
Dec (top/left)	-22°36′04″.90
Dec (top/right)	-22°35′48″.26
Dec (bottom/right)	-23°19′47″.37
Dec (bottom/left)	-23°20′03″.60

Image Index:

Contribution Index (beta):

M20, Trifid Nebulae, LRGB

M20, Trifid Nebulae, LRGB

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Image Index:

Contribution Index (beta):

M20, Trifid Nebulae, LRGB

M20, Trifid Nebulae, LRGB

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

In these collections

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