NGC 7822 - LHaRGB (Scott Badger)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 7822

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NGC 7822 - LHaRGB

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NGC 7822 - LHaRGB

In the past, I've mostly imaged nebulae in just Ha, and this is the first time I've added Ha to an RGB nebula image. Given how much of the target is hydrogen gas, the subtract and add method of adding Ha that I typically use didn't seem like the best approach. So, I created the following integrations: Ha, LHa, RGB, & HaGB. Note that the LHa isn't a blend of Lum and Ha integrations, but instead I integrated the Lum and Ha lights all together using an reference integration of the 10 best of each for Local Normalization. The Ha integration was very similar to the Lum, but a lot more detail. Just tossing the Lum data, and all that acquisition time, was killing me, so I tried the LHa integration and found it had just about as much detail as the Ha integration, but a little less noisy. Ultimately, I went with a blend of the Ha and LHa integrations for a final Luminance. Similarly, I blended the RGB and HaGB integrations to create an HaRGB.

I also used GHS for the first time and though there's a fair amount of learning curve I'll be working through, I preferred the results to my regular goto's, HT and Arcsinh, especially in the amount of depth I got with the more localized control. At the same time, though, that control made matching lum and rgb stretches a little tricky for me.

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	Distinct awarded users	Total awarded images
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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
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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
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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.
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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	Basic success
Started	...
Astrometry.net job	6696660
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 7822 - LHaRGB

NGC 7822 - LHaRGB

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NGC 7822 - LHaRGB

NGC 7822 - LHaRGB

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