Trifid Nebula - Messier 20 - NGC 6514 (Rui Horta Lourenço)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · HD164225 · HD164294 · HD164384 · HD164402 · HD164452 · HD164492 · HD164514 · HD164534 · HD164637 · HD164704 · HD164717 · HD164739 · HD164766 · HD164833 · HD313581 · HD313582 · HD313583 · HD313584 · HD313585 · HD313589 · HD313594 · HD313595 · HD313596 · HD313597 · HD313598 · HD313606 · HD313607 · HD313608 · HD313707 · And 25 more.

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Trifid Nebula - Messier 20 - NGC 6514

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Trifid Nebula - Messier 20 - NGC 6514

The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region in the north-west of Sagittarius in a star-forming region in the Milky Way's Scutum-Centaurus Arm. It was discovered by Charles Messier on June 5, 1764. Its name means 'three-lobe'. The object is an unusual combination of an open cluster of stars, an emission nebula (the relatively dense, reddish-pink portion), a reflection nebula (the mainly NNE blue portion), and a dark nebula (the apparent 'gaps' in the former that cause the trifurcated appearance, also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.The most massive star that has formed in this region is HD 164492A, an O7.5III star with a mass more than 20 times the mass of the Sun. This star is surrounded by a cluster of approximately 3100 young stars.

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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	5896984
PixInsight job	6EU136TTEDGOD9IDTHUZFC14E1L9UXTQ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m31s.311
RA (top/left)	18h00m29s.723
RA (top/right)	18h01m40s.397
RA (bottom/right)	18h04m33s.729
RA (bottom/left)	18h03m21s.886

Dec (center)	-22°54′51″.74
Dec (top/left)	-22°30′17″.74
Dec (top/right)	-23°30′16″.24
Dec (bottom/right)	-23°19′22″.31
Dec (bottom/left)	-22°19′23″.60

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Trifid Nebula - Messier 20 - NGC 6514

Trifid Nebula - Messier 20 - NGC 6514

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Trifid Nebula - Messier 20 - NGC 6514

Trifid Nebula - Messier 20 - NGC 6514

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