Messier 71 Open Cluster in Sagitta (Sigga)

Celestial hemisphere: Northern · Constellation: Sagitta (Sge) · Contains: 12 gam Sge · 8 zet Sge · 9 Sge · M 71 · NGC 6838 · PK057-02.1 · PK057-03.1 · Sagitta · Sh2-84 · The star γSge · The star ζSge

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Messier 71 Open Cluster in Sagitta

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Messier 71 Open Cluster in Sagitta

Messier 71 (also known as M71 or NGC 6838) is a globular cluster in the constellation Sagitta. It was discovered by Philippe Loys de Chéseaux in 1745 and included by Charles Messier in his catalog of comet-like objects in 1780. It was also noted by Koehler at Dresden around 1775.

The star cluster is at a distance of about 12,000 light years away from Earth and spans some 27 light years across. The irregular variable star Z Sagittae is a member of this cluster.

--Wikipedia

More:

Messier71 - Wikipedia

Messier71 - Astropixels.com

Messier71 - SEDS

This is a redo of previous (clueless) attempt which was the 7th astro image I had ever taken:

Messier71 - March 29, 2017

I think made some improvements and was fun project to look back and compare progress! 3 x 300 seconds RGB.

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	2113656
PixInsight job	9XF0M2ENR16DTWGK5DWSCGXKLOH0RBPU
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h53m47s.42
RA (top/left)	19h59m19s.19
RA (top/right)	19h48m15s.53
RA (bottom/right)	19h48m23s.31
RA (bottom/left)	19h59m12s.43

Dec (center)	+18°49′42″.9
Dec (top/left)	+20°46′00″.6
Dec (top/right)	+20°45′55″.6
Dec (bottom/right)	+16°52′58″.8
Dec (bottom/left)	+16°52′58″.9

Image Index:

Contribution Index (beta):

Messier 71 Open Cluster in Sagitta

Messier 71 Open Cluster in Sagitta

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Image Index:

Contribution Index (beta):

Messier 71 Open Cluster in Sagitta

Messier 71 Open Cluster in Sagitta

Equipment

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