M13 (Bernard DELATTRE)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Great Cluster in Hercules · Hercules globular cluster · IC 4617 · M 13 · NGC 6205 · NGC 6207

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M13

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M13

L'amas globulaire M13 ou Messier 13, très souvent appelé le Grand Amas d'Hercule ou simplement Hercule, est parmi les objets les plus imposants du catalogue Messier. Il a été découvert par Edmond Halley en 1714, et ajouté par Charles Messier dans son catalogue le 1er juin 1764.

Comportant plus de 500 000 étoiles, il est aussi l'un des plus vieux objets : son âge est estimé à 12 ou 14 milliards d'années. Il apparaît avec un diamètre de 20 minutes d'arc, soit un diamètre réel de 150 années-lumière. Il a cependant la particularité de contenir de nombreuses étoiles jeunes (appartenance confirmée d'après leur vitesse angulaire), ce qui est inhabituel pour un amas de cet âge : les scientifiques pensent que ces étoiles ne sont pas nées à l'intérieur de l'amas, mais ont plutôt été capturées par ce dernier.

Source Wikipedia

Original
B
Final
C

N.I.N.A. Users
Globular Star Clusters
ZWO ASI1600MM/QHY163M

2a. Images L_RVB
5. MESSIER
Amas globulaires
Ctlg IC (complémentaire NGC)

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.

Status	Advanced success
Started	...
Astrometry.net job	1950628
PixInsight job	J1S8G6TN0XHMEFTWEXQM5NH2RPGGJDIT
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h41m43s.72
RA (top/left)	16h44m35s.44
RA (top/right)	16h38m52s.15
RA (bottom/right)	16h38m53s.96
RA (bottom/left)	16h44m33s.53

Dec (center)	+36°27′49″.5
Dec (top/left)	+36°53′17″.8
Dec (top/right)	+36°53′16″.8
Dec (bottom/right)	+36°02′06″.1
Dec (bottom/left)	+36°01′59″.9

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M13

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