NGC 7023 - The Iris Nebula in LRGB (Ashruazar)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD200099 · HD200775 · Iris Nebula · LBN 487 · LDN 1168 · LDN 1170 · LDN 1171 · LDN 1172 · LDN 1173 · LDN 1174 · NGC 7023

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NGC 7023 - The Iris Nebula in LRGB

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NGC 7023 - The Iris Nebula in LRGB

NGC 7023 - The Iris Nebula captured and processed in LRGB. This Image was captured over 4 nights, with each night dedicated to the 4 filters used (L,R,G,B). This image was captured with the ZWO ASI2600MM-Pro camera, using the William Optics Zenithstar 103 Scope mounted on a ZWO AM5 mount.

Here's a brief outline of the steps taken to process this image, which was stacked using DeepSkyStacker (DSS)
- Cropped each of the LRGB Channels the image using DynamicCrop
- Ran DynamicBackgroundExtraction using Division for each of the Channels (Ha, L, R, G, B)
- RGBChannelCombination to combine the Red, Green and Blue Channels
- Ran SpectrophotometricColorCalibration (SPCC) on the RGB Image
- Used BlurXTerminator & NoiseXTerminator
- Used HistogramTransformation, GeneralisedHyperbolicStretch and CurvesTransformation to stretch the image and increase saturation
- Added Lum Channel to the RGB Data using LRGBChannelTransformation, after processing Lum Channel similarly to the Ha-RGB Channel

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	9837439
PixInsight job	1SOKQ03G38RN6SKOWZCGBLVMH8T4N28Y
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m23s.10
RA (top/left)	21h12m31s.68
RA (top/right)	21h04m12s.23
RA (bottom/right)	20h49m31s.18
RA (bottom/left)	20h58m49s.70

Dec (center)	+68°09′01″.10
Dec (top/left)	+67°25′08″.2
Dec (top/right)	+69°24′23″.7
Dec (bottom/right)	+68°49′55″.8
Dec (bottom/left)	+66°53′27″.8

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NGC 7023 - The Iris Nebula in LRGB

NGC 7023 - The Iris Nebula in LRGB

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Image Index:

Contribution Index (beta):

NGC 7023 - The Iris Nebula in LRGB

NGC 7023 - The Iris Nebula in LRGB

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