M22 (NGC 6656) The Great Sagittarius Cluster in RGB (Ian Parr)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: M 22 · NGC 6656 · The star 25 Sgr

M22 (NGC 6656) The Great Sagittarius Cluster in RGB, Ian Parr

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M22 (NGC 6656) The Great Sagittarius Cluster in RGB

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M22 (NGC 6656) The Great Sagittarius Cluster in RGB

Messier 22 (NGC 6656) is an elliptical globular cluster of stars in the constellation Sagittarius, near the Galactic bulge region.

It is one of the brightest globular clusters visible in the night sky at magnitude 5.1, and at about 10,000 light years away, is one of the nearer globular clusters to Earth spanning 32 arcminutes across with diameter of around 99 light-years. Two black holes of between 10 and 20 solar masses each were discovered by the Very Large Array radio telescope in New Mexico which lead to an estimate of between 5 to 100 black holes within M22. Interactions between stars and black holes could explain the unusually large core of the cluster.

I have been making the most of a cold and clear new moon with some pretty good seeing at times. Last nights' triple meteor shower was bust. Got one from 500 15 second exposures and saw one. So the only blazing trails to contend with were the usual Star Link satellites and even they were pretty well behaved for a change.

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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	6068196
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M22 (NGC 6656) The Great Sagittarius Cluster in RGB

M22 (NGC 6656) The Great Sagittarius Cluster in RGB

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Contribution Index (beta):

M22 (NGC 6656) The Great Sagittarius Cluster in RGB

M22 (NGC 6656) The Great Sagittarius Cluster in RGB

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