NGC7023 Iris Nebula (Mathieu Guinot)

NGC7023 Iris Nebula

Voici un gros plan de NGC 7023, la célèbre Nébuleuse de l'Iris, que je n'avais encore jamais eu l'occasion d'imager.

C'est une nébuleuse par réflexion située à environ 1300 années lumière dans la constellation de Céphée.

Bien que la couleur dominante que l'on retrouve en général sur les images de cette nébuleuse soit le bleu, caractéristique des grains de poussière réfléchissant la lumière des étoiles, la vue rapprochée et les poses au travers du filtre hydrogène ont permis de souligner la lueur rouge caractéristique de l'hydrogène gazeux excité par la jeune étoile centrale à l'intense rayonnement.

Des nuages de poussière et de gaz moléculaires froids sombres et obscurcissant sont également présents.

h de prises de vue en septembre et octobre 2020 à Amiens (ciel Bortle 7) avec :

- Télescope Ritchey Chretien 200mm f/8 (focale: 1624mm)

- Monture Avalon Linear

- Camera QHY 163mm + filtres LRVBH Astrodon

**************************************************

Hi there,

Here is a close-up of NGC 7023, the famous Iris Nebula, which I had never had the opportunity to image before.

It is a reflection nebula located about 1300 light years away in the constellation Cepheus.

Although the dominant color that we generally find in the images of this nebula is blue, characteristic of dust grains reflecting the light of the stars, the close-up view and the poses through the hydrogen filter allowed to emphasize the glow red characteristic of hydrogen gas excited by the young central star with intense radiation.

Dark, obscuring clouds of cold molecular dust and gas are also present.

22h30 of shots in September and October 2020 in Amiens, France (Bortle 7 sky) with:

- Ritchey Chretien 200mm f / 8 telescope (focal length: 1624mm)

- Avalon Linear mount

- 163mm QHY Camera + LRVBH Astrodon filters

Ritchey Chretien telescopes GSO Family
ZWO ASI1600MM/QHY163M

Backyard

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	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

	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

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	5427240
PixInsight job	DOKW9MUCF7NM8IC0QS48477OTVHC7NTM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m34s.694
RA (top/left)	20h58m41s.971
RA (top/right)	21h03m58s.460
RA (bottom/right)	21h04m25s.148
RA (bottom/left)	20h59m13s.924

Dec (center)	+68°10′06″.22
Dec (top/left)	+68°19′17″.40
Dec (top/right)	+68°22′56″.33
Dec (bottom/right)	+68°00′43″.76
Dec (bottom/left)	+67°57′08″.61

Image Index:

Contribution Index (beta):