Messier 101 Pinwell Galaxy ou Galaxie du Moulinet (Lacheheb)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5457 · NGC 5461 · NGC 5471

Messier 101 Pinwell Galaxy ou Galaxie du Moulinet, Lacheheb

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Messier 101 Pinwell Galaxy ou Galaxie du Moulinet

Link: https://1drv.ms/i/s!ApfteboMEzL6u0bAqY77jqKtGvpC?e=X2BiCT

Link to TIFF/FITS: https://1drv.ms/i/s!ApfteboMEzL6u0c9jwymGXFUftqM?e=QdKZKw

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Messier 101 Pinwell Galaxy ou Galaxie du Moulinet

Link: https://1drv.ms/i/s!ApfteboMEzL6u0bAqY77jqKtGvpC?e=X2BiCT

Link to TIFF/FITS: https://1drv.ms/i/s!ApfteboMEzL6u0c9jwymGXFUftqM?e=QdKZKw

M101 (NGC 5457), aussi appelé galaxie du Moulinet, est une très vaste galaxie spirale intermédiaire relativement rapprochée, vue de face et située dans la constellation de la Grande Ourse.
Elle a été découverte par l'astronome français Pierre Méchain en 1781.
Pierre Méchain a découvert cette galaxie et l'a décrite comme une « nébuleuse sans étoiles, très obscure et très grande, de six à sept minutes d'arc en diamètre, entre la main gauche du Bouvier et la queue de la Grande Ourse »
Le 1er mars 1851, Bindon Stoney a découvert six autres nébuleuses à l'intérieur de M101 l'une d'entre elles est un groupe d'étoiles (NGC 5449) et les cinq autres sont des nébuleuses en émission (région HII). Il s'agit de NGC 5450, NGC 5451, NGC 5453, NGC 5455 et NGC 5458. C'est cependant, William Parsons qui a le premier noté la nature spirale de M101 en 1861.

Source : Wikipedia

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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
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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	7670601
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Messier 101 Pinwell Galaxy ou Galaxie du Moulinet

Messier 101 Pinwell Galaxy ou Galaxie du Moulinet

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Messier 101 Pinwell Galaxy ou Galaxie du Moulinet

Messier 101 Pinwell Galaxy ou Galaxie du Moulinet

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