NGC2395 + Abell 21 - Nébuleuse de la méduse (Gérard Nonnez)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: NGC 2395

NGC2395 + Abell 21 - Nébuleuse de la méduse, Gérard Nonnez

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NGC2395 + Abell 21 - Nébuleuse de la méduse

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NGC2395 + Abell 21 - Nébuleuse de la méduse

Je vous présente ma dernière capture

Sur l’image, les 2 principaux objets

Au milieu et en haut, on peut observer un groupe d’étoile, ce petit groupe correspond à un amas ouvert, il porte le repère NGC2395, il est situé à environ 1 690 années-lumière du système solaire et les dernières estimations donnent un âge de 1,2 milliard d'années, cet amas renferme moins de 50 étoiles dont la concentration est moyennement faible

En fait, c’est surtout la nébuleuse à coté qui m’intéressait, il s’agit de la nébuleuse de la méduse, elle porte le repère d’Abell 21 et Sharpless 274

C’est une grande nébuleuse planétaire située dans la constellation des Gémeaux, près de la frontière avec la constellation du Petit Chien. Elle a été découverte en 1955 par George Abell.

On a cru que cette nébuleuse est un rémanent de supernova jusqu'au début des années 1970. En 1971, des astronomes soviétiques ont déterminé qu'il s'agit en réalité d'une nébuleuse planétaire.

j'ai passé 5 jours à poser avec des sessions de 2-3 heures, j'ai conservé 90 poses pour l'image finale.

c'est ma première "Abell", si vous avez des commentaires n'hésitez pas.

J’espère que cette image vous plaira

Bon ciel à tous

Gérard

N.I.N.A. Users
AAA : Astronomes et Astrographes Amateurs
Astrophotographes (France)

diffuse, emission and reflection nebula

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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.
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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	2551860
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC2395 + Abell 21 - Nébuleuse de la méduse

NGC2395 + Abell 21 - Nébuleuse de la méduse

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NGC2395 + Abell 21 - Nébuleuse de la méduse

NGC2395 + Abell 21 - Nébuleuse de la méduse

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