M13 - Globular Cluster in Hercules (Hap Griffin)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Great Cluster in Hercules · M 13 · NGC 6205

M13 - Globular Cluster in Hercules, Hap Griffin

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M13 - Globular Cluster in Hercules

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M13 - Globular Cluster in Hercules

M13 is the best known of a class of objects called globular star clusters. They are generally groups of several hundred thousand stars in a distinctly spherical shape that occupy a halo region around the central bulge of spiral galaxies, such as our own Milky Way galaxy. They also are some of the oldest objects in the universe based on studies of the concentrations of elements within the constituent stars. In the cores of such clusters, the stars are more than 500 times closer together than in normal space.

M13 lies at a distance of 25,100 light years. It is visible by the naked eye from dark sky locations as a very faint smudge along one edge of the "keystone" of stars in the central part of the constellation Hercules. In 1974, M13 was selected to be the target of the first radio message to possible extraterrestrial civilizations intentionally beamed into space from the large radio telescope in Arecibo, Puerto Rico.

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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	1511801
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M13 - Globular Cluster in Hercules

M13 - Globular Cluster in Hercules

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M13 - Globular Cluster in Hercules

M13 - Globular Cluster in Hercules

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