"the Pleiades and the Castle" (Nicolas Escurat)

Contains: Landscape

"the Pleiades and the Castle"

Matériel utilisé pour la prise de vue de cette image non recadrée :

Canon Eos R6ii avec filtre antipollution lumineuse + Canon 200mm F2 sur monture ioptron skyguider pro
Ciel : 60x30sec à 1600iso avec suivi
Paysage : 1x30sec à 1600iso
+ quelques photos pour avoir un rendu HDR de l'éclairage

Quelques détails sur le déroulement de la prise de vue pour les curieux :

-toutes les photos sont prise du même endroit les unes à la suite des autres sans interruption pendant une heure environ, même appareil photo, même objectif, sans changer le cadrage initial
(seul le suivi enclenché fait tourner la monture)
-1ère étape : mise en station de la monture motorisée puis visée du "Château de BIron" à 200mm de focale pour avoir le choix du cadrage final
-ensuite on fait tourner manuellement la monture à l'envers avec le live view activé pour faire apparaitre l'amas à l'endroit voulu par rapport au chateau (avec la rotation de la terre, M45 va finir par revenir à l'endroit du cadrage initial, pas de triche ;-)
-puis enclenchement du suivi motorisé pour suivre l'amas avec début des prises de vue pour la partie ciel vers 23h30
-00h07, le château commence à apparaitre dans le bord inférieur droit du capteur
-00h23, prise de la photo sans suivi avec le château et l'amas avec les mêmes réglages d'exposition (le paysage est alors net)

Il faut ensuite fusionner 2 images :
- la version "starless" de la dernière photo prise sans suivi
- la version "stacking" de la partie ciel

On obtient alors une image composite mais réelle.

(A noter qu'il a fallu réaliser un repérage et une simulation très précise pour réaliser cette image)

Nicolas Escurat

Please note: The following tables are updated every 24 hours.

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
Solar system
Extremely wide field
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
Traveller
Own remote observatory
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.

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Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
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"the Pleiades and the Castle"

"the Pleiades and the Castle"

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"the Pleiades and the Castle"

"the Pleiades and the Castle"

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