Messier 13: The Great Globular Cluster in Hercules (Prabhakaran)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Hercules Globular Cluster · IC 4617 · M 13 · NGC 6205 · NGC 6207

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Messier 13: The Great Globular Cluster in Hercules

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Messier 13: The Great Globular Cluster in Hercules

Like shiny flakes sparkling in a snow globe, over 100,000 stars whirl within the globular cluster M13, one of the brightest star clusters visible from the Northern Hemisphere. Located 25,000 light-years from Earth with an apparent magnitude of 5.8, the cluster stars crowd into a region 150 light-years in diameter. Approaching the cluster core upwards of 100 stars could be contained in a cube just 3 light-years. For comparison, the closest star to the Sun is over 4 light-years away. These stars are so crowded that they can, at times, run into each other and even form a new star. The resulting “blue stragglers” appear to be younger than the other stars in their immediate vicinity and are of great scientific interest to astronomers. Distant background galaxies in the medium-wide field of view include NGC 6207 at the lower left. This glittering metropolis of stars in the constellation Hercules can be spotted with a pair of binoculars most easily in July .

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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	Advanced success
Started	...
Astrometry.net job	4644664
PixInsight job	4D1PIFSVQTPOGZOCH1ILDVDPAZ398JRB
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h41m40s.293
RA (top/left)	16h40m01s.498
RA (top/right)	16h40m04s.964
RA (bottom/right)	16h43m17s.974
RA (bottom/left)	16h43m16s.769

Dec (center)	+36°27′29″.65
Dec (top/left)	+36°53′52″.86
Dec (top/right)	+36°00′41″.16
Dec (bottom/right)	+36°01′01″.36
Dec (bottom/left)	+36°54′13″.43

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Messier 13: The Great Globular Cluster in Hercules

Messier 13: The Great Globular Cluster in Hercules

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Image Index:

Contribution Index (beta):

Messier 13: The Great Globular Cluster in Hercules

Messier 13: The Great Globular Cluster in Hercules

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Acquisition details

Description

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