NGC 7635 - Bubble Nebula and neighbours SHO (Mike Lynch)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · M 52 · NGC 7538 · NGC 7635 · NGC 7654

NGC 7635 - Bubble Nebula and neighbours SHO, Mike Lynch

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NGC 7635 - Bubble Nebula and neighbours SHO

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NGC 7635 - Bubble Nebula and neighbours SHO

Captured 26th October 2022.
Location - Aberdeenshire, Scotland

25 x Ha Lights @ 300s
25 x OIII Lights @ 300s
25 x SII Lights @ 300s
25 x Flats for each filter
30 x Darks @ 300s
100 x Bias

Used Telescopius online for initial framing – minor framing adjustments and manual rotation adjustments prior to running Voyager Sequence.

Pre Processed in PixInsight to Star Registration using WBPP before using John Murphy’s Normalized Scale Gradient V2.2.3 Normalisation Data method to weight and stack each filter.

Post Processed in PixInsight - Background Neutralisation, Dynamic Background Extraction, Linear Fit and Dynamic Crop before using Pixel Math to combine with following combination:

Red = 0.3*SII + 0.7*Ha
Green = 0.3*Ha + 0.6*OIII + 0.1*SII
Blue = 0.9*OIII + 0.1*Ha

Removed stars, colour and luminance adjustments using Curves and Bill Blanshan’s colour masks and removed noise with Topaz DeNoiseAI before recombining with stars using Pixel Maths ~(~Stars*~Starless).

Finally I used Bill Blanshan's Star Reduction method V3 (Starnet/PixelMath) to reduce star size (1 iteration, mode 1).

Thanks to John Murphy for his fantastic, very effective and easy to use NSG script. Bill Blanshan for brilliant Process Icons including Star Reduction and Colour Masks, Adam Block for general online PixInsight processing information and fantastic videos. Big shout out to Leonardo Orazi for the Voyager software and the great personally answered support – reliable automated sessions every time.

Thanks as always to Salvatore Iovene for AstroBin and allowing everyone to share their efforts and allow others to enjoy them.

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	Basic success
Started	...
Astrometry.net job	6502253
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 7635 - Bubble Nebula and neighbours SHO

NGC 7635 - Bubble Nebula and neighbours SHO

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NGC 7635 - Bubble Nebula and neighbours SHO

NGC 7635 - Bubble Nebula and neighbours SHO

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