SH2 132 - La nébuleuse du lion HOO (Vergnes Christophe)

SH2 132 - La nébuleuse du lion HOO

SH2-132, aussi dénommée la nébuleuse du Lion pour sa ressemblance avec cet animal, est une nébuleuse étendue dans la constellation de Céphée. Elle est distante d’environ 10 400 années-lumière de la Terre et son diamètre couvre plus de 250 années-lumière. Les étoiles responsables de l’ionisation de ses gaz sont très chaudes et massives; en particulier, deux étoiles Wolf-Rayet ont été identifiées, connues sous les lettres HD 211564 et HD 211853. Elles émettent leur rayonnement surtout dans l’hydrogène (Hydrogène-Alpha) et aussi très faiblement dans l’oxygène (OIII). Les taches sombres à l’intérieur de la tête de la nébuleuse sont dues à la suie qui bloque la lumière. Il y a aussi des nébuleuses noires bien en vue qui bloquent la lumière des étoiles derrière elles à l’extérieur de la zone principale de Sh2-132.

C'est une version HOO avec les étoiles SHO mixées et traitées pour avoir les couleurs RVB
________________________________________________

Nebula SH2-132, called the Leo Nebula for its resemblance to this animal, is an extended nebula in the constellation Cepheus. It is about 10,400 light-years distant from Earth and its diameter covers more than 250 light-years. The stars responsible for the ionization of its gases are very hot and massive; in particular, two Wolf-Rayet stars have been identified, known under the letters HD 211564 and HD 211853. They emit their radiation mainly in hydrogen (Hydrogen-Alpha) and also very weakly in oxygen (OIII). The dark patches inside the nebula's head are due to soot blocking light. There are also prominent dark nebulae that block starlight behind them outside the main area of Sh2-132.

It's a HOO version with the SHO stars mixed and processed to have the RGB colors

	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
Artificial satellite

	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	...
PixInsight job	AO6DDW0T2PPYNXVKGKW3TVBN207TVHK4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h17m55s.64
RA (top/left)	22h22m25s.80
RA (top/right)	22h12m27s.73
RA (bottom/right)	22h13m34s.38
RA (bottom/left)	22h23m17s.62

Dec (center)	+55°56′42″.2
Dec (top/left)	+56°31′11″.5
Dec (top/right)	+56°19′02″.0
Dec (bottom/right)	+55°21′38″.6
Dec (bottom/left)	+55°33′26″.7

AstroBin

AstroBin

Image Index:

Contribution Index (beta):