M54 (Gary Imm) - AstroBin

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: M 54 · NGC 6715

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M54

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M54

This globular star cluster, also known as NGC 6715, is located 90,000 light years away in the constellation of Sagittarius at a declination of -30 degrees. This magnitude 7.7 cluster spans 8 arc-minutes in our apparent view, which corresponds to a diameter of 200 light years.

This object is the furthest Messier star cluster from earth and the 2nd most massive globular cluster in the sky (after Omega Centauri). In fact, this object was the first globular cluster discovered to belong to a different galaxy. In 1994, scientists discovered that M54 belongs to the Sagittarius Dwarf Spheriodal Galaxy, one of the satellite galaxies of the Milky Way that will eventually be captured by our galaxy. Because of its distance from earth, the core is not resolvable into individual stars and instead appears as a bright white mass.

Images from the EdgeHD Series
ZWO ASI294MM Pro Images
CMOS Imagers
Cloudy Nights
Schmidt-Cassegrain Telescope (SCT) Imagers
Texas Astronomy
Globular Star Clusters

Globular Clusters
Globular Clusters (SDSG)
Messier Catalog (Complete)

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	5150110
PixInsight job	JOG9R407E17SJCYH1T2Q8HSN36SFOWIM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h55m03s.553
RA (top/left)	18h55m56s.464
RA (top/right)	18h54m10s.184
RA (bottom/right)	18h54m10s.306
RA (bottom/left)	18h55m57s.600

Dec (center)	-30°28′46″.15
Dec (top/left)	-30°20′47″.20
Dec (top/right)	-30°20′55″.37
Dec (bottom/right)	-30°36′44″.38
Dec (bottom/left)	-30°36′36″.49

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M54

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M54

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