Globular Cluster Messier 71 (M71 or NGC 6838) (Tom Wildoner)

Celestial hemisphere: Northern · Constellation: Sagitta (Sge) · Contains: M 71 · NGC 6838 · The star 9 Sge

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Globular Cluster Messier 71 (M71 or NGC 6838)

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Globular Cluster Messier 71 (M71 or NGC 6838)

Messier 71 (M71 or NGC 6838) is a globular cluster in the small northern constellation Sagitta and is about 12,000 light years away from Earth. Up until the 1970’s this cluster was designated as a densely packed open cluster because of the loose central region, today it is designated as a loosely concentrated globular cluster with a young age of 9-10 billion years.

Observation data (J2000 epoch)
Class: X-XI
Constellation: Sagitta
Right ascension: 19h 53m 46.49s
Declination: +18° 46′ 45.1″
Apparent magnitude (V): 8.2
Apparent dimensions (V): 7.2'

Tech Specs: Sky-Watcher Esprit 120ED Telescope, ZWO ASI2600MC camera running at 0F, 85x60 seconds guided exposures, Sky-Watcher EQ6R-Pro pier mounted, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: May 18, 2023. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).

Globular Star Clusters
Messier Objects

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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 failed
Started	...
Astrometry.net job	8166587
PixInsight job	8PIYOTU31A5XXSZDOE0VL1YWMI3FZHTY
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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Globular Cluster Messier 71 (M71 or NGC 6838)

Globular Cluster Messier 71 (M71 or NGC 6838)

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Image Index:

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Globular Cluster Messier 71 (M71 or NGC 6838)

Globular Cluster Messier 71 (M71 or NGC 6838)

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