M13 The Great Hercules Cluster; Hercules (Thomas V. Davis)

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

Powered byPixInsight

M13 The Great Hercules Cluster; Hercules

Powered byPixInsight

M13 The Great Hercules Cluster; Hercules

M13 The Great Hercules Cluster; Hercules

Astro Systeme Austria N12 f/3.5 astrograph

KAI-11000M

Total Exposure 2+ Hours; LRGB 40:30:30:30 min; unbinned

April 27-28, 2007; Inkom, ID

Comments: The largest globular cluster seen from northern latitudes, the Hercules cluster can been seen with the unaided eye against very darks skies as a very faint, fuzzy "star". Through a modest telescope many of the stars may be resolved. A closer view of the core may be seen here.

At its distance of 25,100 light years, its angular diameter of 20' corresponds to a linear 145 light years - visually, it is perhaps 13' large. It contains several 100,000 stars; Timothy Ferris in his book Galaxies even says "more than a million". Towards its center, stars are about 500 times more concentrated than in the solar neighborhood. The age of M13 has been determined by Sandage as 24 billion years and by Arp as 17 billion years around 1960; Arp later (in 1962) revised his value to 14 billion years (taken from Kenneth Glyn Jones) [from SEDS].

This image was a NASA APOD, May 18, 2007.

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	2099080
PixInsight job	7G3VCFTLI1SF1TYHZTN1PNNPVN1XOVCT
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	16h41m43s.83
RA (top/left)	16h44m47s.63
RA (top/right)	16h44m40s.90
RA (bottom/right)	16h38m36s.27
RA (bottom/left)	16h38m51s.23

Dec (center)	+36°26′40″.2
Dec (top/left)	+35°31′45″.3
Dec (top/right)	+37°22′43″.7
Dec (bottom/right)	+37°21′15″.10
Dec (bottom/left)	+35°30′25″.1

Image Index:

Contribution Index (beta):

M13 The Great Hercules Cluster; Hercules

M13 The Great Hercules Cluster; Hercules

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

M13 The Great Hercules Cluster; Hercules

M13 The Great Hercules Cluster; Hercules

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information