La galaxie de l’œil du Tigre (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 2841

La galaxie de l’œil du Tigre, Corine Yahia (RIGEL33)

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La galaxie de l’œil du Tigre

Link to TIFF/FITS: https://flic.kr/p/2jefPeN

Powered byPixInsight

La galaxie de l’œil du Tigre

Link to TIFF/FITS: https://flic.kr/p/2jefPeN

A la nouvelle Lune de mars, au début du confinement, j’ai sorti ma lunette dans le jardin pour imager les comètes C/2019 Y4 et C/2017 T2 dont j’ai déjà posté les images. Voulant profiter à fond de l’installation et de ce ciel sans trafic aérien, j’ai pointé deux autres objets que j’avais mis dans ma liste des cibles incontournables.

La première cible est une galaxie spirale nichée tout près de la patte avant de la Grande Ourse. De son nom populaire de galaxie de l’œil du Tigre, elle est cataloguée NGC 2841. A une distance d’environ 53 millions d’années-lumière, elle a été découverte par William Herschel en 1788. Cette galaxie a un diamètre d’environ 125.000 années-lumière, soit à peu près la taille de notre propre galaxie mère, la Voie Lactée.

Malheureusement, la pollution lumineuse du village étant assez importante et malgré le filtre CLS, il a été difficile d’avoir des poses de bonne qualité et l’image finale est très moyenne. Le traitement a été assez ardu pour obtenir un fond de ciel acceptable… et du coup, j’ai cramé le cœur de l’univers-île.

Photo prise le 23 mars 2020 à Saucats (33) – Canon 7D avec CLS au foyer d’une lunette apo 100/900 sur monture Sirius EQ-G (sans goto, ni autoguidage).

83 poses de 2 mn, ISO 800, 23 DOF, Iris et Toshop.

AAA : Astronomes et Astrographes Amateurs

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