IC 4996 open cluster, RGB-HOO (AnaTa)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD193007 · HD193076 · HD228721 · IC 4996

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IC 4996 open cluster, RGB-HOO

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IC 4996 open cluster, RGB-HOO

This image contains open cluster IC 4996, which is dominated by Ha with minimal (but existing) input from Oiii. SNR is about 100.

Processing:
Dynamic Crop for R, G, B, O3 and Ha
RGB combine.
DBE for RGB
Color calibration for RGB
Blur and Noise XT for RGB, Ha and O3.
Star XT for RGB
Standard linear HT stretching for RGB (strong stretch) and RGB-stars (medium stretch)
Standard linear HT stretching for Ha and O3

RGB was created.
Noise XT and then HT stretch again
Curves for star and nebula saturation and brightness adjustment.
Annotation (panel A)

Combined HOO.
Noise XT on HOO.
HT stretch again.
Star XT on HOO. Stars are discarded
LHE. Kernel radius 40 and 150 (setting 0.2-0.3).
Curves for RGB-stars and HOO-nebula: saturation, hue and brightness adjustments.
RGB-stars were added to HOO to created RGB-HOO.
Done. RGB-HOO (panel B)

Original
Final
B

Clusters (Open)

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	9913626
PixInsight job	W15OIOPPUQKUINY8RXTNW7TEURBSM3P4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h16m29s.940
RA (top/left)	20h15m32s.794
RA (top/right)	20h17m24s.656
RA (bottom/right)	20h17m25s.649
RA (bottom/left)	20h15m33s.234

Dec (center)	+37°38′17″.10
Dec (top/left)	+37°27′13″.34
Dec (top/right)	+37°27′05″.44
Dec (bottom/right)	+37°49′17″.45
Dec (bottom/left)	+37°49′26″.10

Image Index:

Contribution Index (beta):

IC 4996 open cluster, RGB-HOO

IC 4996 open cluster, RGB-HOO

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Image Index:

Contribution Index (beta):

IC 4996 open cluster, RGB-HOO

IC 4996 open cluster, RGB-HOO

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these collections

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