IC 4756 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Serpens (Ser) · Contains: IC 4756

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IC 4756

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IC 4756

This object is an open star cluster located 1300 light years away in the constellation of Serpens at a declination of +5 degrees. The cluster spans 40 arc-minutes in our apparent view, which corresponds to a diameter of 15 light years.

I messed up on this object. I originally tried it with a wider FOV, but I felt that the cluster was lost in the background and not distinctive. So I chose a narrower FOV which just barely frames the object. You can see the cluster stars well but there is not enough background to properly frame the object. I should have just gone with the wider FOV. I will image this object properly sometime in the future.

This cluster is a naked eye object in dark skies, at a magnitude of 4.3. Even though it is a naked eye object, it went undiscovered for a long time because the cluster is so wide and bright that, for the telescopes of most obervers (like myself above), the cluster just looks like another rich Milky Way star field.

ZWO ASI183/QHY183
The refractors!
Cloudy Nights
Open Star Clusters
Takahashi Refractors

Hidden Treasures Catalog (Complete*)
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	2985514
PixInsight job	WB9Y3I6S0YFNAUJGO91DAGIHMKG52YYO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h38m45s.642
RA (top/left)	18h37m24s.870
RA (top/right)	18h40m21s.527
RA (bottom/right)	18h40m07s.286
RA (bottom/left)	18h37m09s.551

Dec (center)	+05°29′08″.45
Dec (top/left)	+05°12′17″.40
Dec (top/right)	+05°18′00″.22
Dec (bottom/right)	+05°45′57″.79
Dec (bottom/left)	+05°40′15″.50

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IC 4756

IC 4756

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Image Index:

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IC 4756

IC 4756

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