The Great Hercules Cluster (Derek Santiago)

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

The Great Hercules Cluster, Derek Santiago

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The Great Hercules Cluster

Link: https://pbase.com/image/170747070

Link to TIFF/FITS: https://pbase.com/image/170747070

Powered byPixInsight

The Great Hercules Cluster

Link: https://pbase.com/image/170747070

Link to TIFF/FITS: https://pbase.com/image/170747070

The Great Hercules Cluster, M13, is the largest globular in the northern hemisphere. It shines at magnitude 5.8 and is approximately 25,000 light years distant and consists of probably 300,000 stars. There are numerous red giants, including Cepheid variables. The small blue stars are likely "blue stragglers", new stars formed by collisions among the densely packed neighbors.

Imaging Camera: QSI640wsg

Imaging Scope: Celestron 9.25"Edge HD at f/7

Guide Camera: SX Lodestarx2

Mount: Avalon M-Uno Fast Reverse

Filters: Astrodon Gen II LRGB

Exposure: 180 min Lum, 1 minute subs binx1, 90 min each RGB, 1 minute subs binx2.

Capture: APT

Processing: CCD Stack and PS CC

Date: 5/26/20 and 5/25/20

Sky conditions: Below average seeing, bortle white skies, SQM 17.8 mag/arc-sec2

Location: My front driveway. Morristown, NJ

Original
B
Final
C

B

Description: Removed some of the green cast

Uploaded: ...

C

Description: still working on color

Uploaded: ...

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	Basic success
Started	...
Astrometry.net job	3578201
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Contribution Index (beta):

The Great Hercules Cluster

The Great Hercules Cluster

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Image Index:

Contribution Index (beta):

The Great Hercules Cluster

The Great Hercules Cluster

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

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