M58 et ses voisines (Doublegui)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: IC 3608 · M 58 · M 59 · M 60 · NGC 4550 · NGC 4564 · NGC 4567 · NGC 4568 · NGC 4579 · NGC 4607 · NGC 4621 · NGC 4647 · NGC 4649

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M58 et ses voisines

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M58 et ses voisines

Une image de M58 et du groupe de galaxies alentour.

Photographie au téléobjectif Tamron à 600 mm, ouvert à f/7.1 sur APN Canon 6D à 1600 ISO non défiltré.

Pas de guidage.

Image à peine recadrée.

Pour la première fois, j'ai opéré un peu de dithering aléatoire manuel pendant la prise de vue des images brutes, pour tenter d'éliminer les vilaines trames bruitées que je constate souvent (ma monture se décale bien toute seule comme une grande entre chaque pose, ça oui, mais toujours dans la même direction... !).

Au final, une bonne surprise car au traitement sur StarTools, je m'aperçois d'une amélioration notable de la répartition du bruit : du bruit oui, ça il en reste encore plein ha, ha :-), mais il n'y a plus de trame régulière visible : c'est un plus pour le traitement qui peut être poussé un peu plus je trouve.

Ah, un jour je passerai sans doute à un vrai guidage avec un vrai dithering... ! Mais là, je continue d'avancer petit à petit, découvrir et essuyer les difficultés progressivement, et ce n'est pas plus mal pour moi comme ça ;-)

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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
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.

Status	Basic success
Started	...
Astrometry.net job	3448397
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M58 et ses voisines

M58 et ses voisines

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M58 et ses voisines

M58 et ses voisines

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