Entre Cor Caroli et Chara (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 94 · NGC 4736

Entre Cor Caroli et Chara, Corine Yahia (RIGEL33)

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Entre Cor Caroli et Chara

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

Le 4 mai 2016, nous pouvions enfin profiter du ciel noir de Tauxigny (37). Voulant profiter, comme la grande majorité des astrams de France, de beau ciel bien dégagé enfin propice aux observateurs et astrophotographes, nous étions partis un jour plus tôt aux NAT (Nuits astronomiques de Touraine).

Pour première cible, j'ai choisi M94, une galaxie spirale vue de face dans la constellation des Chiens de Chasse située entre les deux étoiles Cor Caroli et Chara.

Il y a longtemps que cet objet trainait dans ma liste des images à faire… et cette fois, c'est fait. J'ai pu cumuler près de deux heures de poses… et je suis satisfaite du résultat bien que je trouve le cœur un peu trop brillant. Mais je n'ai pas pu en diminuer la luminosité sans perdre du signal sur les bras spiraux près du centre. On voit la seconde couronne d'étoiles plus faibles et plus éloignée.

J'ai pu rehausser la couleur des étoiles en bas à droite et, dans le même secteur, on voit une petite galaxie spirale barrée cataloguée NGC 4704.

Photo prise le 4 mai 2016 à Tauxigny (37) – 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).

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

AAA : Astronomes et Astrographes Amateurs

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