Messier 13 in Hercules (Steve Milne)

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

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Messier 13 in Hercules

Link: https://stevemilne.smugmug.com/Photos/Sky/Stars/i-cRRPXcV

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Messier 13 in Hercules

Link: https://stevemilne.smugmug.com/Photos/Sky/Stars/i-cRRPXcV

Messier 13 (NGC 6205) is a globular cluster around 22, 000 light years away in the constellation of Hercules. It was first observed by Halley in 1714 and was entered into Messier's catalogue in 1764. It is around 145 light years in diameter and is one of the brightest clusters in the northern hemisphere. As such, it is often referred to as the Great Globular Cluster in Hercules.

One distinctive feature of M13 is the series of dark lanes near the core that form a 'Y' shaped feature, commonly called the propellor. These were first observed in 1850 by Bindon Stoney using Lord Rosse’s renowned 72" reflector - the 'Leviathan of Parsontown'. In this image, the propellor can be seen just above and left of the core.

M13 was photographed between 6 and 19 May 2021. Capture details as follows:

Telescope: Takahashi FSQ 106

Camera: QSI 683

Filters: Astrodon

Mount: 10 Micron GM1000HPS

Red: 60 x 300s

Green: 60 x 300s

Blue: 60 x 300s

A total of 15 hours exposure.

Data: Steve Milne & Barry Wilson

Processing: Steve Milne

Entre Encinas y Estrellas (e-EyE)
The refractors!
Takahashi Refractors

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	4555479
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Messier 13 in Hercules

Messier 13 in Hercules

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