M16-M17 (Cyril.besson69)

Celestial hemisphere: Southern · Constellation: Serpens (Ser) · Contains: Checkmark Nebula · Eagle Nebula · IC 4701 · IC 4703 · IC 4706 · IC 4707 · Lobster Nebula · M 16 · M 17 · NGC 6596 · NGC 6605 · NGC 6611 · NGC 6618 · Star Queen · Swan Nebula · omega Nebula

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M16-M17

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M16-M17

M17, également connue sous les noms de nébuleuse Oméga, du Cygne, du Fer à Cheval ou du Homard, est une nébuleuse en émission située à environ 5 500 années-lumière de la Terre dans la constellation du Sagittaire et un diamètre de 15 années -lumière.
La nébuleuse fait partie d'un nuage du milieu interstellaire d'une quarantaine d'années-lumière d'envergure.
Elle doit sa luminosité à des étoiles jeunes de type B qui irradient le gaz alentour, ainsi qu'une région HII. La couleur rouge de la nébuleuse est d'ailleurs celle de l'hydrogène ionisé.
Au sein de la nébuleuse se trouverait un amas ouvert constitué d'une trentaine d'étoiles masquées par la nébuleuse.

Encore en processus de formation, M16 est un très jeune amas stellaire. Il est âgé de seulement 5,5 millions d'années et le processus de formation d'étoiles est toujours en cours du fait de la présence de jeunes étoiles massives et très chaude de type spectral.
Situé à 7 000 années lumière, M16 est un amas ouvert de petite taille (7 minutes d'arc) comparé à la grandeur de la nébuleuse dont il fait partie intégrale (30 minutes d'arc), mais il est l'un des plus brillants qui soit, de manière absolue.

Mosaique de 2 panneaux en HOO-RVB

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	Basic success
Started	...
Astrometry.net job	6652155
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M16-M17

M16-M17

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M16-M17

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