M3 - Globular Cluster (M3 - Globula Custer) (Joe Santacroce)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD119081 · HD119391 · M 3 · NGC 5272

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M3 - Globular Cluster (M3 - Globula Custer)

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M3 - Globular Cluster (M3 - Globula Custer)

M3 - Globular Cluster
Messier 3 is a globular cluster of stars in the northern constellation of Canes Venatici. Wikipedia

The globular cluster M3 was the first object in the Messier catalog to be discovered by Charles Messier himself. Messier spotted the cluster in 1764, mistaking it for a nebula without any stars. This misunderstanding of M3’s nature was corrected in 1784 when William Herschel was able to resolve the cluster’s individual stars. Today it is known to contain over 500,000 stars.

M3 is notable for containing more variable stars than any other known cluster. The brightness of a variable star fluctuates with time. For some variable stars, their period relates to their intrinsic luminosity, so astronomers can use those stars’ brightness fluctuations to estimate their distances. This makes them extremely useful for measuring distances to deep-sky objects. M3 contains at least 274 variable stars. NASA

Age: 11.4 billion years
Radius: 90 light years
Distance to Earth: 33,920 light years

Taken With:
William Optics GT71 with ASI183MC-p Camera
William Optics 50mm Guide with ASI290mm Camera
Skywatcher HEQ5 Mount
ASIAir

Processed in Pixinsight and Photoshop
14 images x 300 sec exposure
Total Integration: 1hr 10 minutes

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	6882562
PixInsight job	VWNBWUL3IMPOJ8RD1CD7JYVODJW29D4N
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h41m57s.110
RA (top/left)	13h43m37s.390
RA (top/right)	13h43m24s.689
RA (bottom/right)	13h40m16s.160
RA (bottom/left)	13h40m30s.516

Dec (center)	+28°15′22″.28
Dec (top/left)	+27°45′19″.30
Dec (top/right)	+28°47′21″.18
Dec (bottom/right)	+28°45′20″.62
Dec (bottom/left)	+27°43′20″.11

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M3 - Globular Cluster (M3 - Globula Custer)

M3 - Globular Cluster (M3 - Globula Custer)

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M3 - Globular Cluster (M3 - Globula Custer)

M3 - Globular Cluster (M3 - Globula Custer)

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