Open Cluster Messier 39 in Cygnus (Tom Wildoner)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD204917 · HD205073 · HD205085 · HD205116 · HD205117 · HD205198 · HD205210 · HD205331 · LDN 1012 · M 39 · NGC 7092

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Open Cluster Messier 39 in Cygnus

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Open Cluster Messier 39 in Cygnus

Messier 39 or M39, also known as NGC 7092, is an open cluster of stars in the constellation of Cygnus. When observed in a small telescope at low power the cluster shows around two dozen members but is best observed with binoculars. It has a total integrated magnitude (brightness) of 5.5 and spans an angular diameter of 29 arcminutes – about the size of the full Moon. It is centered about 1,010 light-years away.

Observation data (J2000 epoch)
Right ascension: 21h 31m 48.0s
Declination: +48° 26′ 00″
Distance: 1,010 ly
Apparent magnitude (V): 4.6
Apparent dimensions (V): 29′

Tech Specs: Sky-Watcher Esprit 120ED Telescope, ZWO ASI2600MC camera running at 0F, 83x60 seconds guided exposures, Sky-Watcher EQ6R-Pro pier mounted, ZWO EAF and ASIAir Pro, processed in DSS and PixInsight. Image Date: May 26 andJune 17, 2023. Location: The Dark Side Observatory (W59), Weatherly, PA, USA (Bortle Class 4).

Open Star Clusters

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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	8489205
PixInsight job	KMGM555RNRVBVL72DQ2JDJULHBZ7F3PH
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h31m55s.876
RA (top/left)	21h27m34s.740
RA (top/right)	21h36m52s.501
RA (bottom/right)	21h36m23s.185
RA (bottom/left)	21h26m54s.221

Dec (center)	+48°25′33″.29
Dec (top/left)	+47°49′42″.38
Dec (top/right)	+47°58′19″.43
Dec (bottom/right)	+49°00′44″.24
Dec (bottom/left)	+48°52′07″.88

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Open Cluster Messier 39 in Cygnus

Open Cluster Messier 39 in Cygnus

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Open Cluster Messier 39 in Cygnus

Open Cluster Messier 39 in Cygnus

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