Grand champ sur Ruchbah et Segin de Cassiopée (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: NGC 457 · NGC 663 · NGC 744 · Part of the constellation Cassiopeia (Cas) · The star 1Per · The star 32Cas · The star 4Per · The star 53Cas · The star Ruchbah (δCas) · The star εCas · The star θCas · The star μCas · The star φCas · The star χCas

Grand champ sur Ruchbah et Segin de Cassiopée, Corine Yahia (RIGEL33)

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Grand champ sur Ruchbah et Segin de Cassiopée

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

Powered byPixInsight

Grand champ sur Ruchbah et Segin de Cassiopée

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

Lors de la dernière soirée aux Nuits Astronomiques de Touraine 2017, le ciel était encore bon mais cela ne devait pas durer. Je lançais toutefois mes deux setups dont l’un, le grand champ, sur la constellation de Cassiopée riche en amas d’étoiles ouverts. Je visais la partie gauche de la constellation, celle qui comprend les étoiles Ruchbah (Delta cas – une binaire à éclipses) et Segin (Epsilon cas) cas c’est dans cette partie, non loin de Ruchbah que se trouve l’amas d’E.T. (NGC 457) aussi appelé l’amas de la Libellule ou amas de la Chouette.

A part M103, NGC 609 et IC 166, tous les autres amas répertoriés dans la seconde image, ont été découvert par la famille Herschell : William, son fils John et sa sœur Caroline, à la fin du 18e et début du 19e siècle. Découvertes au 18e siècle, M103 est à mettre au compte de Charles Messier et NGC 609 au compte d’Heinrich d’Arrest, un prussien. Quant à IC 166, je n’ai pas trouvé d’information, si ce n’est que l’Index Catalogue (IC), supplément du catalogue NCG, a été compilé à la fin du 19e siècle par John Dreyer.

La soirée astrophoto était pourtant bien partie en cette soirée du 26 mai, mais c’était sans compter sur l’arrivée de nuages qui avait décidé qu’on devait tous se coucher plus tôt afin de reprendre la route le lendemain. Quand vers minuit, j’arrêtais la prise de vue, j’avais cumulé peu de poses mais suffisantes pour obtenir les images « potables » ci-dessous, la seconde étant la version annotée de la première ;)

Photo prise le 26 mai 2017 à Tauxigny (12) – Canon 350D avec objectif 90-300mm, focale à 90 mm, ouvert à F4.5, sur StarAventurer motorisée (sans goto, ni autoguidage).

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

AAA : Astronomes et Astrographes Amateurs

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Astrometry.net job	1835635
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Grand champ sur Ruchbah et Segin de Cassiopée

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