M13 - Hercules Globular cluster (Duane Melvin)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: HD150293 · HD150462 · HD150510 · HD150566 · HD150679 · HD150998 · Hercules Globular Cluster · IC 4613 · IC 4614 · IC 4615 · IC 4616 · IC 4617 · M 13 · NGC 6196 · NGC 6197 · NGC 6205 · NGC 6207

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M13 - Hercules Globular cluster

Powered byPixInsight

M13 - Hercules Globular cluster

Exposures: 250 subs 30 Seconds each
Camera Gain: 100
Sky Darkness: Bortle 6
Optical Filter: Optolong L-Pro 2-inch filter

Camera: Orion G26 26Mp Color 16 Bits APS-C format cooled to -15C
Darks: 25 subs at -15C
No bias, dark flats, or Flats were used (I clean all lenses, camera sensor, and filters before every session)

Main Telescope: Skywatcher Esprit ED100 100mm x 550mm triplet refractor with supplied doublet flattener
Guide Telescope: (No off-axis guiding for this old boy) - Orion 80mm x 300mm doublet refractor with Starshoot TM camera direct ST4 to mount
Mount: The amazing EQ6RPRO
Guiding: PHD2, 0.2 pixel performance on 5u pixel size

Starizona magnetic single filter tray
Hand-focusing using a fine-cut Bahtinov mask
Ambient temp 41F did not use telescope heat wrap

RA axis Polar Alignment: QHY Polemaster NCP exact alignment

Software:
Alienware i17 8k laptop
APT capture
Deep Sky Stacker
Pixinsight
Adobe Photoshop
Adobe Lightroom

Star Talk: M13 is composed of 200 galaxies and is 25000 light years distant from Earth.

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	7503894
PixInsight job	Z700N6FSM1976K7HFZJBR1YPTB8NLXQR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h41m40s.32
RA (top/left)	16h40m00s.58
RA (top/right)	16h36m07s.69
RA (bottom/right)	16h43m16s.93
RA (bottom/left)	16h47m19s.77

Dec (center)	+36°29′34″.7
Dec (top/left)	+37°50′35″.10
Dec (top/right)	+35°39′53″.9
Dec (bottom/right)	+35°08′16″.3
Dec (bottom/left)	+37°18′10″.8

Image Index:

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M13 - Hercules Globular cluster

M13 - Hercules Globular cluster

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M13 - Hercules Globular cluster

M13 - Hercules Globular cluster

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