M22 The Sagittarius Cluster (Dale A Chamberlain)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: HD171495 · HD171524 · HD171572 · HD171612 · M 22 · NGC 6656 · PGC 207036 · PGC 207053 · PGC 207066 · PGC 207102 · PGC 207387 · PGC 207399 · PGC 2802209 · PK009-07.1 · V1311 Sgr · V2007 Sgr · V2592 Sgr · V3853 Sgr · V3855 Sgr · V4067 Sgr · V4068 Sgr · V4069 Sgr · V4191 Sgr · V4192 Sgr

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M22 The Sagittarius Cluster

Link: https://chamberlainobservatory.com/welcome-to-the-chamberlain-observatory-website/photo-gallery/m22-the-sagittarius-cluster/

Powered byPixInsight

M22 The Sagittarius Cluster

Link: https://chamberlainobservatory.com/welcome-to-the-chamberlain-observatory-website/photo-gallery/m22-the-sagittarius-cluster/

Messier 22 or M22, also known as NGC 6656, is an elliptical globular cluster of stars in the constellation Sagittarius, near the Galactic bulge region.

It is one of the brightest globulars visible in the night sky. The brightest stars are 11th magnitude, with hundreds of stars bright enough to resolve with an 8" telescope.

M22 was one of the first globulars to be discovered, in 1665 by Abraham Ihle and was included in Charles Messier's catalog of comet-like objects in 1764. It was one of the first globular clusters to be carefully studied by Harlow Shapley in 1930. He placed within it roughly 70,000 stars and found it had a dense core.

M22 is one of the nearer globular clusters to Earth – at about 10,600 light-years away. Its diameter (width across) is 99 ± 9 light-years, given its estimated distance. 32 variable stars have been recorded in M22. It is in front of part of the galactic bulge and is therefore useful for its microlensing effect on those background stars.

Ritchey Chretien telescopes GSO Family
Central USA
Cooled Color Cams
ZWO ASI 2600MC PRO
CMOS Imagers
Cloudy Nights
The OSC Club (One Shot Camera)
Globular Star Clusters
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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
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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	6369253
PixInsight job	VLGGVN1AOSLJ6FKNP7G3ZG1WHT0OQRAZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h36m26s.470
RA (top/left)	18h37m59s.999
RA (top/right)	18h34m53s.210
RA (bottom/right)	18h34m52s.721
RA (bottom/left)	18h38m00s.232

Dec (center)	-23°54′43″.98
Dec (top/left)	-23°40′21″.70
Dec (top/right)	-23°40′23″.58
Dec (bottom/right)	-24°08′59″.99
Dec (bottom/left)	-24°08′59″.99

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M22 The Sagittarius Cluster

M22 The Sagittarius Cluster

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M22 The Sagittarius Cluster

M22 The Sagittarius Cluster

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