M8, M20, M21 (Giovanni)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Hourglass nebula · Lagoon nebula · M 20 · M 21 · M 8 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6530 · NGC 6531 · NGC 6546 · The star 4Sgr · The star 7Sgr · The star 9Sgr · Trifid nebula

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M8, M20, M21

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M8, M20, M21

M8, M20, M21

Elevation: about 16°

Der Lagunennebel (auch mit Messier 8 oder NGC 6523 bezeichnet) ist eine Struktur aus Emissions- und Reflexionsnebel mit einer Helligkeit von +6,0 mag und einer Winkelausdehnung von 90' × 40' im Sternbild Schütze. Er ist etwa 5200 Lichtjahre von der Erde entfernt.

Der Trifidnebel (auch als Messier 20 oder NGC 6514 bezeichnet) ist ein Emissions- und Reflexionsnebel im Sternbild Schütze. Der Name stammt von dem lateinischen Wort trifidus „dreigeteilt, dreigespalten“, da eine dunkle Staubwolke (Barnard 85) den Nebel dreiteilt.

Messier 21 (auch als NGC 6531 bezeichnet) ist ein +5,9 mag heller offener Sternhaufen mit einer Flächenausdehnung von 13' im Sternbild Schütze. M21 ist in Mitteleuropa wegen seiner südlichen Position nicht leicht zu beobachten. Wikipedia.

The refractors!
Imagers of Italy

Messier

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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	Basic success
Started	...
Astrometry.net job	1672797
PixInsight job	n/a
PixInsight queue size	n/a
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M8, M20, M21

M8, M20, M21

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M8, M20, M21

M8, M20, M21

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