LDN1622 to M78 Mosaic in HaLRGB (Dan Watt)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: M 78 · NGC 2064 · NGC 2067 · NGC 2068 · NGC 2071 · NGC 2112 · The star 56 Ori · The star 59 Ori

Image of the day 02/08/2023

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LDN1622 to M78 Mosaic in HaLRGB

Image of the day 02/08/2023

Powered byPixInsight

LDN1622 to M78 Mosaic in HaLRGB

5 Panels total, each with an average of 30 hours of data. This region has always fascinated me and for the longest time I wanted to do a deep mosaic of the area. This took about three months of traveling to dark (bortle 2) sites in the Mojave Desert to get all the LRGB data required. HA was aquired from my backyard in Los Angeles, and even with 6nm narrowband filter I still needed around 16 hours per panel to get a useable image because of the insane light pollution here.

A mild application of BlurXterminator was applied to all master images before anything else.
DBE on each panel/channel. This took a very long time, as I wanted the natural background gradients but had to get rid of some odd effects from airglow and such. Overall the images were pretty clean since I took them from a very dark site and was careful not to image below 30 degrees.

I used the MosaicByCoordinates workflow to join each channels mosaic together. That's for L, R, G, B, & HA

Channel combination to join the RGB. PhotometricColorCalibration and background neutralization to get the colors close to where I wanted them.
I then mixed the HA channel with the L and the R channels using the screen blending method in pixelmath.

Generalised Hyperbolic Stretch was used to bring the images into non-linear space, followed by TGVDenoise on all images.

LRGBCombination to mix the HaLum image with the HaRGB image.

Some curves to even things out. And finally brought into photoshop for some cleanup and finetuning of colors.

Fast Newtonians
SoCal Astrophotography
/r/astrophotography
Cloudy Nights

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	Image of the day	Top pick	Top pick nominations	Total submitted
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Unknown

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Status	Basic success
Started	...
Astrometry.net job	7086590
PixInsight job	n/a
PixInsight queue size	n/a
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Image of the day 02/08/2023

LDN1622 to M78 Mosaic in HaLRGB

Image of the day 02/08/2023

LDN1622 to M78 Mosaic in HaLRGB

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Image of the day 02/08/2023

LDN1622 to M78 Mosaic in HaLRGB

Image of the day 02/08/2023

LDN1622 to M78 Mosaic in HaLRGB

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