M20 - Trifid Nebula (Michael & Jon Norman)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · HD164169 · HD164171 · HD164193 · HD164225 · HD164226 · HD164294 · HD164384 · HD164402 · HD164452 · HD164492 · HD164514 · HD164534 · HD164637 · HD164703 · HD164704 · HD164717 · HD164718 · HD164739 · HD164766 · HD164767 · HD164815 · HD164833 · HD164844 · HD164864 · HD164883 · HD164971 · HD164993 · HD313560 · HD313561 · And 84 more.

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M20 - Trifid Nebula

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M20 - Trifid Nebula

M20 - Trifid Nebula / M21

There is a lot going on in this image.

M20 combines a red emission nebula with a blue reflection nebula, dust lanes, which separate the emission nebula into three lobes, hence the name "Trifid" and a star cluster within the nebula itself.

The upper right corner of the image contains M21, a "young" star cluster not associated with M20 that contains many dim stars as well as a few blue giants.

To the left of M20 is a faint red region corresponding to an emission nebula - Sh2-28

The detail present in the core of Trifid never ceases to capture my attention, so its tempting to show just M20 in the frame, but the larger field of view allows several less prominent, but complementary objects to serve as a backdrop.

This is actually the first image I (Michael) have posted here, the rest being the effort of my son, Jonathan. Lots more to follow, as I become more proficient at image processing.

Michael Norman

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	8278481
PixInsight job	ZZA93YG76PYK1RBJD10015N4MAPCVF65
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m40s.601
RA (top/left)	18h04m53s.774
RA (top/right)	18h04m49s.400
RA (bottom/right)	18h00m29s.140
RA (bottom/left)	18h00m30s.766

Dec (center)	-22°57′31″.40
Dec (top/left)	-23°42′47″.42
Dec (top/right)	-22°11′30″.91
Dec (bottom/right)	-22°12′04″.63
Dec (bottom/left)	-23°43′20″.77

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M20 - Trifid Nebula

M20 - Trifid Nebula

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M20 - Trifid Nebula

M20 - Trifid Nebula

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