{"id":5813,"date":"2022-01-16T17:46:56","date_gmt":"2022-01-16T22:46:56","guid":{"rendered":"https:\/\/ciel-astro-ccd.com\/wp\/?page_id=5813"},"modified":"2022-03-12T18:05:34","modified_gmt":"2022-03-12T23:05:34","slug":"m78","status":"publish","type":"page","link":"https:\/\/ciel-astro-ccd.com\/wp\/m78\/","title":{"rendered":"M 78"},"content":{"rendered":"\n
\"L\u2019attribut<\/a>
Cliquer sur l\u2019image pour l\u2019afficher plein \u00e9cran<\/em><\/figcaption><\/figure>\n\n\n\n
Date<\/strong>
2021\/12\/29 et 2022\/01\/02

Lieu d\u2019observation<\/strong>
Nouveau-Mexique<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n

Technique<\/strong><\/h4>\n\n\n
T\u00e9lescope<\/td>Takahashi Epsilon 250 – 10\u201c, 850mm FL @ f\/3.4<\/td><\/tr>
Monture<\/td>Paramount ME<\/td><\/tr>
Cam\u00e9ra d\u2019imagerie<\/td>SBIG ST10XME – Non Anti Bloomin Gate (NABG) r\u00e9gul\u00e9 \u00e0 -10o<\/sup> Celsius<\/td><\/tr>
Type d\u2019image<\/td>L(RVsB) (Vs pour vert syngh\u00e9tique<\/em>)<\/td><\/tr>
Exposition<\/td>Luminance (10 x 5\u2019 bin 1\u00d71), R (10 x 1\u2019 bin 2×2) et B (10 x 1\u2019 bin 2×2)<\/td><\/tr>
Pr\u00e9traitement<\/td>Maxim DL<\/a><\/td><\/tr>
Traitement<\/td>Photoshop et PixInsight<\/a><\/td><\/tr>
Traitement sp\u00e9cifique<\/td>Cr\u00e9er une image verte synth\u00e9tique<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n

Descripton de l\u2019objet<\/strong><\/h4>\n\n\n
Type d\u2019objet<\/td>N\u00e9buleuse \u00e0 r\u00e9flexion<\/td><\/tr>
Constellation<\/td>Orion<\/td><\/tr>
Magnitude visuelle<\/td> 8,3<\/td><\/tr>
Brillance de surface<\/td>12,24<\/td><\/tr>
Distance<\/td>1600 ann\u00e9es-lumi\u00e8re<\/td><\/tr>
Diam\u00e8tre<\/td>3,5 ann\u00e9es-lumi\u00e8re<\/td><\/tr>
Dimension vue de la Terre<\/td>8′ x 6′ d\u2019arc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
M78 est une n\u00e9buleuse \u00e0 r\u00e9flexion situ\u00e9e dans la constellation d\u2019Orion. Il s’agit d’un nuage de poussi\u00e8re interstellaire illumin\u00e9 par de jeunes \u00e9toiles. Elle est distante de 1600 ann\u00e9es-lumi\u00e8re de la Terre et son diam\u00e8tre est de 3,5 ann\u00e9es-lumi\u00e8re. Elle a \u00e9t\u00e9 d\u00e9couverte en 1780 par Pierre M\u00e9chain. C\u2019est la n\u00e9buleuse diffuse la plus brillante du groupe local. Charles Messier l’ajouta \u00e0 son catalogue le 17 d\u00e9cembre de la m\u00eame ann\u00e9e.

Visuellement, dans un ciel de faible pollution lumineuse, M78 ressemble \u00e0 une faible com\u00e8te. Avec des jumelles, elle est juste visible comme une tr\u00e8s petite tache. De petits instruments permettent d\u00e9j\u00e0 de la voir bien brillante, et r\u00e9v\u00e8lent les \u00e9toiles qui la mettent en valeur.

Dans mon image, qui a \u00e9t\u00e9 prise dans un ciel sans pollution lumineuse (au Nouveau-Mexique), on voit la n\u00e9buleuse M78 au centre de l\u2019image. On peut aussi voir les tr\u00e8s faibles n\u00e9bulosit\u00e9s sombres de couleur bleue qui entourent la n\u00e9buleuse. On voit aussi la n\u00e9buleuse NGC2067 \u00e0 droite de la n\u00e9buleuse M78 qui est s\u00e9par\u00e9e par un nuage de poussi\u00e8re sombre. On voit aussi la n\u00e9buleuse NGC2071 dans le haut de l\u2019image.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Richard Beauregard
Le Ciel Astro \u2013 CCD
Mon impression \u00ab Nous ne pouvons pas \u00eatre seuls dans ce gigantesque univers \u00bb<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

Date2021\/12\/29 et 2022\/01\/02 Lieu d\u2019observationNouveau-Mexique Technique T\u00e9lescope Takahashi Epsilon 250 – 10\u201c, 850mm FL @ f\/3.4 Monture Paramount ME Cam\u00e9ra d\u2019imagerie SBIG ST10XME – Non Anti Bloomin Gate (NABG) r\u00e9gul\u00e9 \u00e0 -10o Celsius Type d\u2019image L(RVsB) (Vs pour vert syngh\u00e9tique) Exposition Luminance (10 x 5\u2019 bin 1\u00d71), R (10 x 1\u2019 bin 2×2) et B…<\/p>\n

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