Messier 13 (Mathieu Guinot)

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

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Messier 13

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Messier 13

The Great Cluster in Hercule is without doubt one of the most beautiful globular clusters in the northern sky but also one of the oldest objects in our galaxy, estimated to be at least 12 billion years old.
Located at a close distance from the Earth, about 22000 light-years away, it contains more than 500,000 stars in a diameter of barely 150 light-years.

I'm still delighted with the TOA's magical sharpness, which reveals all its potential on this kind of target, with its diameter of just 130mm and yet a nice separation of the stars in the centre of the cluster.

There's no need to introduce the famous Y, which, once your eyes have become accustomed to the glare of the centre, becomes hypnotically obvious and eye-catching :-)

The spiral galaxy NGC6207 (around 64 million light-years away) in the upper left-hand corner of the image gives us lovely details of its bluish arms and HII regions, while the background sky is teeming with a host of other galaxies.

Finale version is a 3000x3000 crop and you can also find the full field in rev B.

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	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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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.

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Astrometry.net job	7898724
PixInsight job	n/a
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