NGC 7129 in HaLRGB! (C. Jonas Moiel)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD206897 · IC 5134 · LBN 497 · LDN 1181 · LDN 1183 · NGC 7129 · NGC 7133 · NGC 7142 · VdB146

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NGC 7129 in HaLRGB!

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NGC 7129 in HaLRGB!

I photographed NGC 7129 from July-September 2023 using Ha and LRGB filters. I was happy to see some of the Ha structures rising up from the central core of the star cluster.

This image was a challenge to process due to the reddish brown dust, dark nebulosity, and combined Ha data. It was a balancing act to get contrast between the various layers. StarEX was also not pulling the central bright star away from the starless layer, so I stretched the image prior to star removal to maintain some accuracy of the stretch.

I added the Ha data to the RGB image using a continuum subtraction method in Pixelmath. I also put 10% of the Ha signal into the blue channel after reading Kevin Morefield's processing description for NGC 6744, which adds some blue color to the Ha giving it a more of a magenta color. The Ha signal was also added to the luminance layer.

I took roughly 10 hours of luminance and would have liked to have collected more to bring out the dim brownish dust. Maybe next year!

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Other
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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	Advanced success
Started	...
Astrometry.net job	8535760
PixInsight job	I2C57H5IZ5Q3DO1T3W8MVXPDXRZRG30P
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h43m35s.388
RA (top/left)	21h40m58s.251
RA (top/right)	21h41m02s.508
RA (bottom/right)	21h46m08s.233
RA (bottom/left)	21h46m12s.341

Dec (center)	+66°05′44″.27
Dec (top/left)	+66°26′52″.82
Dec (top/right)	+65°44′24″.67
Dec (bottom/right)	+65°44′26″.20
Dec (bottom/left)	+66°26′53″.47

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NGC 7129 in HaLRGB!

NGC 7129 in HaLRGB!

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NGC 7129 in HaLRGB!

NGC 7129 in HaLRGB!

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