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IC1848 Mosaic

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IC1848 Mosaic was created by Brent

Six panel mosaic in Ha. Image is represented by 3 5 minute images processed in PixInSight and a final erase if overlap issues with Luminar AI.
2 months 1 week ago #84400
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Replied by fmozza on topic IC1848 Mosaic

Nicely done! can you share your setup (scope/mount/image camera) and a brief summary of your workflow?

jmh
2 months 1 week ago #84401

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Replied by Brent on topic IC1848 Mosaic

Sure. ZWO ASI183MM Pro, Optolong 1 1/4" 7nM Ha filter, 8 position ZWO EFW, ZWO EAF focuser, 8" SkyWatcher Quatrto Imaging Newtonian scope with SW Comma Corrector on a DIY hypertuned CGEM mount guided by a StarField 60mm guide scope with a ZWO ASI 120MM Mini camera. Used a StellarMate O/S for capture and control.

On this image I set up a schedule to capture a 2x3 mosaic. Slew, Focus, Plate Solve and guiding were all under the O/S's control. When the sequence was finished it parked the mount and warmed the camera. The data was all processed in PixInSight. Sadly I am new to using the PhotoMetric Mosaic tool in Pix, and I had to use Luminar to repair the noticeable horizontal overlap. Oddly the vertical overlap was not noticeable.

I should add the data was taken from my observatory at 52N -108W in a Bortle 2 sky, with the Moon at 98-99% illumination.
2 months 1 week ago #84403

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Replied by Brent on topic IC1848 Mosaic

The workflow. As everyone knows there are multiple ways to do the same task in Pix. What I did here was use WBPP to integrate images for each panel and save as .fits. I then set out to put the mosaic panels together.

First I input the all the saved fits images into the "Image Analysis" Script run the tool and again save which will have a WCS.fit extension. The saved WCS.fit are put into "Mosaics by Co-orinates" Script and again saved as registered.fit. Then on to "Trim Mosaic Tile" Script which i save as (replace) registered.fit. The final step is to use "Photometric Mosaic Script" which you can only stitch (integrate) two panels together at a time. Once all the panel are stitched together you can process as if it is just a single image......

I should add that due to variable sky conditions over a long night I have found it wise to adjust the stacked and registered images with histogram transformation prior to getting too deep into the work flow. I can provide links to two video which help explain the how and why the workflow is what it is. I have been toying with the idea of putting a video together, it would be long or a few shorter sequential videos. Just ask and I will try to help. ( I have dyslexia which makes reading learning ummmm difficult, show me a video or show me how and I never forget....)
2 months 1 week ago #84408

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