M39 / NGC 7092 Open Cluster in Cygnus (autonm)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: M 39 · NGC 7092

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M39 / NGC 7092 Open Cluster in Cygnus

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M39 / NGC 7092 Open Cluster in Cygnus

Newcastle, UK

Messier 39 (NGC 7092) *Open Cluster in Cygnus

When observed in a small telescope at low power the cluster shows around two dozen members.

It has a total integrated magnitude (brightness) of 5.5. It is centered about 1,010 light-years away.

This cluster has an estimated mass of 232 Solar Mass and a linear tidal radius of 8.6±1.8 pc. Of the 15 brightest components, six form binary star systems; one more is suspected. HD 205117 is a probable eclipsing binary system with a period of 113.2 days that varies by 0.051 in visual magnitude. Both members seem to be subgiants. Within are at least five chemically peculiar stars and ten suspected short-period variable stars.

*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.

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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.
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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	5007887
PixInsight job	39Y2Z2IDYRDVP0U68E5I9JP5RD1CBER6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h31m39s.71
RA (top/left)	21h36m37s.61
RA (top/right)	21h36m23s.89
RA (bottom/right)	21h26m30s.70
RA (bottom/left)	21h27m07s.100

Dec (center)	+48°29′52″.9
Dec (top/left)	+47°27′59″.4
Dec (top/right)	+49°34′15″.7
Dec (bottom/right)	+49°30′42″.2
Dec (bottom/left)	+47°24′46″.5

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M39 / NGC 7092 Open Cluster in Cygnus

M39 / NGC 7092 Open Cluster in Cygnus

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Image Index:

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M39 / NGC 7092 Open Cluster in Cygnus

M39 / NGC 7092 Open Cluster in Cygnus

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