L'Anneau, Sheliak et les trois galaxies (Corine Yahia (RIGEL33))

L'Anneau, Sheliak et les trois galaxies

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

Entre deux séjours à Ambeyrac (vacances et RAAGSO), nous avions une sortie officielle à Saucats, sur le site du Mémorial de la Ferme de Richemont. La nuit s'annonçait assez belle mais il n'était pas question pour autant de trop veiller car le lendemain matin, il fallait être présent au village pour le forum des associations. Du coup, je choisis une cible assez facile : l'Anneau de la Lyre.

Comme mon champ était assez vaste, j'ai tenté de cadrer avec l'Anneau, trois petites galaxies proches, ainsi qu'une étoile formant la constellation de la Lyre : Sheliak. Concernant les galaxies, nous pouvons voir IC 1296 (une spirale vue de face) juste sous l'Anneau, puis PGC 62522 (vue par la tranche) au centre droit de l'image, formant un triangle avec l'Anneau et Sheliak, et enfin la presque invisible NGC 6713 (galaxie lenticulaire) à droite de Sheliak.

En plus de la courte nuit, j'ai dû jeter un tiers de mes poses à cause de la buée qui avait envahi le secondaire… et comme on devait sûrement bien se marrer avec les copains, j'ai oublié d'aller vérifier les acquisitions en cours de route !

Mais malgré ce peu de poses, l'image est plutôt jolie… enfin… à mon goût ! D'autant que j'ai fait peu de traitement sous toshop ;)

Photo prise le 5 septembre 2015 à Saucats (33) - Canon 350D défiltré (avec correcteur de coma) au foyer d'un Newton 150/750 sur monture Orion Sirius EQ-G motorisé (sans autoguidage ni goto).

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

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