M103 Open Cluster in Cassiopeia (autonm)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: M 103 · NGC 581 · PK127-01.1

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M103 Open Cluster in Cassiopeia

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M103 Open Cluster in Cassiopeia

Newcastle, UK

M103 Open Cluster in Cassiopeia

Messier 103 is an *open cluster where a few hundred, mainly very faint, stars figure in Cassiopeia. It is one of the more distant open clusters, 8,000 to 9,500 light-years from the solar system and ranging over about 15 light years.

It holds about 40 certain-member stars, two of which have magnitudes 10.5, and a 10.8 red giant, which is the brightest within the cluster. A bright known foreground object is the star Struve 131, not a member of the cluster.

The cluster may have 172 stars if including those down to 50% probability of a gravitational tie. M103 is about 25 million years old.

*An open cluster is a type of star cluster made of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way Galaxy, and many more are thought to exist.

They are loosely bound by mutual gravitational attraction and become disrupted by close encounters with other clusters and clouds of gas as they orbit the galactic center. This can result in a migration to the main body of the galaxy and a loss of cluster members through internal close encounters.

Open clusters generally survive for a few hundred million years, with the most massive ones surviving for a few billion years. In contrast, the more massive globular clusters of stars exert a stronger gravitational attraction on their members, and can survive for longer. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring.

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
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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	4717136
PixInsight job	AFQY5NO644MPPC9G3SBTVRR0648X1WHA
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	01h33m24s.13
RA (top/left)	01h36m07s.66
RA (top/right)	01h38m07s.50
RA (bottom/right)	01h30m32s.72
RA (bottom/left)	01h28m51s.56

Dec (center)	+60°39′40″.2
Dec (top/left)	+59°54′21″.4
Dec (top/right)	+61°15′34″.9
Dec (bottom/right)	+61°24′47″.4
Dec (bottom/left)	+60°03′12″.3

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M103 Open Cluster in Cassiopeia

M103 Open Cluster in Cassiopeia

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M103 Open Cluster in Cassiopeia

M103 Open Cluster in Cassiopeia

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