M92 Globular Cluster (Edward Overstreet)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: IC 4645 · M 92 · NGC 6327 · NGC 6329 · NGC 6332 · NGC 6341 · NGC 6344

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M92 Globular Cluster

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M92 Globular Cluster

Almost didn't process this set. The night saw clouds come and go - out of 100 lights - I culled 60 and the 40 I kept were a mixed bag. I used DSS to register, calibrate, and stack - everything else was done in Photoshop CC. Stretches were done with incremental black point adjustments in curves and levels - once exposed - everything else, tonality, luminosity, and structure was done using luminosity masks. There was no noise reduction software used. Along with the 40 subs, I used 30 darks, 60 bias, and 100 flats.

Although the ambient temp was in the high 80's during much of the photo session (typical hot summer South Carolina night) the heat reduction system on the DSLR, Nikon D800e performed well. Albeit the exposures were just 30 seconds - still to have minimal noise at 1250 ISO on a hot summer night I credit to the heat reduction system that was modded at Spencers along with the very very fast F/3.9 Newt.

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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Top picks
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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
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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	1135993
PixInsight job	KBIMNOCKSTOROSTD3GXQHSVCPK66ECCP
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	17h17m01s.26
RA (top/left)	17h12m54s.46
RA (top/right)	17h15m23s.52
RA (bottom/right)	17h21m04s.41
RA (bottom/left)	17h18m41s.82

Dec (center)	+43°07′39″.2
Dec (top/left)	+43°35′56″.10
Dec (top/right)	+42°17′46″.2
Dec (bottom/right)	+42°38′49″.1
Dec (bottom/left)	+43°57′29″.1

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M92 Globular Cluster

M92 Globular Cluster

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M92 Globular Cluster

M92 Globular Cluster

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