De la Dentelle à Tauxigny (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: IC 1340 · NGC 6992 · NGC 6995 · Network nebula · Veil nebula

De la Dentelle à Tauxigny, Corine Yahia (RIGEL33)

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De la Dentelle à Tauxigny

Link to TIFF/FITS: https://flic.kr/p/Xx4YGi

Powered byPixInsight

De la Dentelle à Tauxigny

Link to TIFF/FITS: https://flic.kr/p/Xx4YGi

Toujours aux Nuits astronomiques de Touraine, la troisième nuit, la cible choisie était inédite pour moi : la Grande Dentelle. Cataloguée par John Dreyer par les désignations NGC 6992 (partie longiligne à droite sur l’image), NGC 6995 (rebiquage à gauche) et IC 1340 (extensions plus faibles du rebiquage), elle s’étend sur 1,2° dans le ciel. Située dans la constellation du Cygne, c’est la partie la plus brillante du rémanent de supernova des Dentelles du Cygne, dont l’explosion remonterait à des dizaines de milliers d’années. Il s'agit d'un rémanent en coquille : la propagation du gaz à partir de la supernova se fait de façon plus ou moins circulaire, selon la nature du milieu interstellaire dans lequel il se propage. Les Dentelles du Cygne ont été découvertes par William Herschel en 1784.

Avec plus de poses, j’aurais pu avoir plus de détails sur NGC 6995 mais des voiles nuageux s’étaient invités et j’ai eu pas mal de déchets. Il a été aussi difficile de cadrer l’ensemble de la Grande Dentelle et je lui ai coupé la « queue ». La prochaine fois – car il y aura une prochaine fois – je m’appliquerais un peu mieux…

Photos prises le 25 mai 2017 à Tauxigny (37) – Canon 350D défiltré au foyer d’une lunette Skywatcher 100/900 (avec aplanisseur/réducteur) sur monture Orion Sirius EQ-G (sans autoguidage ni goto).

39 poses de 2 mn – 15 DOF – ISO 800 – IRIS et Toshop.

AAA : Astronomes et Astrographes Amateurs

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Astrometry.net job	1730185
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