Une galaxie perdue dans l'espace (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: NGC 6503

Une galaxie perdue dans l'espace, Corine Yahia (RIGEL33)

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Une galaxie perdue dans l'espace

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

Powered byPixInsight

Une galaxie perdue dans l'espace

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

Alors qu’un appareil photo imageait la nébuleuse de l’Âme, je mis le second au foyer de mon télescope lors de cette belle nuit à Ambeyrac, en pré-RAAGSO début septembre ! Je visais encore une fois la constellation du Dragon où j’avais imagé la veille et l’avant-veille, dans la croupe du monstre, quelques galaxies bien sympathiques. Près du cœur de l’animal céleste, je trouvais une belle galaxie naine spirale NGC 6503. Elle se situe à une distance d’environ 17 millions d’années-lumière dans une région de l’espace appelée Vide Local. Cette région, voisine de notre Groupe Local, est ainsi appelée à cause de sa pauvreté en univers-îles. L'astronome Stephen James O’Meara l’a surnommé la « galaxie perdue dans l'espace » dans son livre de 2007 "Hidden Treasures" à cause de sa position à l'extrémité du vide local. Il est vrai qu’elle paraît bien isolée dans ce champ d’étoiles de notre propre galaxie la Voie Lactée !

Je suis contente du résultat qu’a donné mon traitement que, malgré sa légèreté, fait apparaître des détails dans la galaxie. Le nombre de poses cumulées y est sûrement pour quelque chose ;)

Photo prise le 7 septembre 2016 à Ambeyrac (12) – Canon 350D (avec correcteur de coma) au foyer d’une Newton 150/750 sur monture Orion Sirius EQ-G (sans autoguidage ni goto).

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

AAA : Astronomes et Astrographes Amateurs

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Astrometry.net job	1494148
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Une galaxie perdue dans l'espace

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