Le Cœur d'Ambeyrac (Corine Yahia (RIGEL33))

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1795 · IC 1805 · IC 1848 · NGC 1027 · NGC 896

Le Cœur d'Ambeyrac, Corine Yahia (RIGEL33)

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Le Cœur d'Ambeyrac

Link to TIFF/FITS: https://flic.kr/p/RAjiD8

Powered byPixInsight

Le Cœur d'Ambeyrac

Link to TIFF/FITS: https://flic.kr/p/RAjiD8

Lors des pré-RAAGSO (du 5 au 7 septembre 2016), nous avons eu un ciel bien dégagé qui m’a permis d’imager. Le mardi, je voulais m’attaquer à un grand champ sur la nébuleuse du Cœur (IC 1805), une nébuleuse par émission, située à 6.500 années-lumière entre les constellations de Cassiopée et de Persée (tout près du Double Amas). Cette nébuleuse contient un amas ouvert d’étoiles (au centre du Cœur) : Melotte 15. La forme de la pointe du Cœur (en bas de la nébuleuse) est cataloguée NGC 896… aussi connue comme la nébuleuse de la Tête de Poisson. On peut voir également en haut à gauche de l’image, une partie de la nébuleuse de l’âme (IC 1848).

Ce n’est pas la première fois que je m’attaque à cet objet mais je n’ai jamais réussi soit le cadrage, soit la prise de vue. Cette fois-ci, sous le ciel nocturne bien noire des Causses du Quercy, j’ai pu prendre mon temps et cumuler assez de poses pour sortir une image correcte et publiable, bien que perfectible. J’ai recadré l’image pour éliminer une vilaine coma sur le coin inférieur gauche. Voici ci-dessous le résultat final que me plaît bien.

Photo prise le 6 septembre 2016 à Ambeyrac (12) – Canon 350D défiltré, objectif 55-200mm, focale à 55mm, ouvert à F/4.0, sur monture StarAventurer (sans autoguidage ni goto).

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

Sky-Watcher Star Adventurer
AAA : Astronomes et Astrographes Amateurs

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
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Astrometry.net job	1487272
PixInsight job	n/a
PixInsight queue size	n/a
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