M39 (Kurt Zeppetello)

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

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M39

Link: http://kurt-zeppetello.blogspot.com/2016/10/m39.html

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M39

Link: http://kurt-zeppetello.blogspot.com/2016/10/m39.html

Messier 39 (NGC 7092) is an open cluster in the constellation Cygnus. It is only about 800 light years away from our solar system and 300 million year old. It is group of about 30 stars may look like they are spread fairly far apart in the sky, but this group is only a 7 light years across. All of its stars are main sequence and the very brightest of them are just about to evolve into the red giant star phase (source: Wikipedia, Universe Today).

I have now have 44 Messier objects down, only 66 to go! (Messier Objects with an ED80)

I recently purchased StarTools as an addition to my image processing. It seems to be easy to use although certain functions take time. Also, I had to upgrade my ram to 8 MB from 4 MB as recommended by Ivo Jager (the developer of StarTools). I had some troubles doing certain functions such as AutoDev. Ivo believes it is do to some sort of stretching in DSS even though I did not add any. In any case, I have used it at different points on this image. I like using it after processing with PS because the resolution is better. It seems when I do it in StarTools first, the resolution goes down, however, this may be do to my limited processing knowledge.

Original
Final
B

N.I.N.A. Users
Imaged with APT

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Messier Objects
Open Clusters

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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.
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	1295535
PixInsight job	TB91DB1Q97KSAHLI5CTJC0SGU6LK2UI3
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h31m53s.38
RA (top/left)	21h28m54s.83
RA (top/right)	21h34m36s.16
RA (bottom/right)	21h34m54s.14
RA (bottom/left)	21h29m08s.41

Dec (center)	+48°29′55″.0
Dec (top/left)	+48°12′13″.8
Dec (top/right)	+48°08′26″.7
Dec (bottom/right)	+48°47′17″.5
Dec (bottom/left)	+48°51′09″.7

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M39

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