Brocchi's Cluster / Amas du Cintre (Tyco)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: NGC 6802 · The star 4Vul · The star 5Vul

Brocchi's Cluster / Amas du Cintre, Tyco

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Brocchi's Cluster / Amas du Cintre

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Brocchi's Cluster / Amas du Cintre

Je ne connaissais pas cet amas brillant situé dans la constellation du petit Renard, un peu à côté du triangle d'Eté et pas très loin d'Albireo. Mais j'ai été surpris de tomber sur cet alignement quasi parfaits aux jumelles cet été !!! Et pas à dire, il ressemble vraiment à un cintre (ici inversé).

Malheureusement, il est trop parfait pour être vrai. L'amas du cintre n'est pas un amas ouvert en tant que tel mais un "astérisme". C'est à dire que ce regroupement d'étoiles n'est qu'un pur effet de perspective !!

Cet image met bien en valeur la colorimétrie des étoiles. Nous sommes toujours à quelques degrés de la voie Lactée, on remarque donc pas mal d'étoiles rougissantes.

L'étoile brillante blanche (magnitude 5) est une étoile de même classe que le Soleil (G) et donc de température proche (6500K) , plus brillante, c'est par contre une géante ! D'une distance respectable de 270 Al, elle est quand même 25X plus lumineuse.

A cette distance, le Soleil aurait une magnitude d'environ 9, le plaçant dans la multitude d'étoiles "moyennes" de cette image (mag limite autour de 18).

Dans les autres étoiles, certaines, les plus bleues, font la comparaison mais sont bien plus chaudes (classes A ou B, soit 10000K), et certaines sont situées bien plus loin,à 900 Al, ce sont des monstres ! D'autres plus froides, sont jaune orangée et en fin de vie.

En haut à gauche, on remarque l'amas ouvert NGC6802, de magnitude 9, situé bien plus loin, à 3000 Al !

Original
B
C
Final
D

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

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
Deep sky
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Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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
Started	...
Astrometry.net job	698656
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Brocchi's Cluster / Amas du Cintre

Brocchi's Cluster / Amas du Cintre

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Brocchi's Cluster / Amas du Cintre

Brocchi's Cluster / Amas du Cintre

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