ngc 7023 (TEAM_ARO)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · NGC 7023

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ngc 7023

Link: https://astroaro.fr/fr_ngc-7023/

Link to TIFF/FITS: https://astroaro.fr/fr_ngc-7023/

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ngc 7023

Link: https://astroaro.fr/fr_ngc-7023/

Link to TIFF/FITS: https://astroaro.fr/fr_ngc-7023/

La Nébuleuse de l’Iris ou NGC 7023 se situe a 1300 années-lumière de la Terre, dans la Constellation de Céphée. NGC 7023 est un magnifique exemple de nébuleuse par réflexion: le rayonnement n’est pas assez fort pour exciter les atomes du nuage de poussières et produire ainsi de la lumière, comme c’est le cas par exemple pour les nébuleuses a émission . Elle se contente donc simplement de diffuser par réflexion la lumière d’une étoile très brillante, en l’occurrence l’étoile SAO 19158, de magnitude 7. Ce n’est pas la seule nébuleuse du ciel à évoquer une fleur. La zone de réflexion bleue de la Nébuleuse de l’Iris mesure environ 6 années-lumière de diamètre,, mais on peut apercevoir que les nuages de gaz et de poussières qui l’entourent (nébuleuses obscures) sont beaucoup plus grands.

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	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
Artificial satellite

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.

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