Help needeed to fill the gaps of a mosaic. [Deep Sky] Processing techniques · JB Auroux · ... · 3 · 117 · 2

Jean-Baptiste_Paris 12.69
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Hi everyone ! 

Back in summer 2021, I captured a 2-panel mosaic of Sh2-119, and in summer 2023, a 4-panel mosaic of NGC 7000.
Both were done using the same setup and camera (TSA102 + Atik 16200).


While stitching the Sh2-119 tiles this weekend (yes, 4 years after acquisition — no rush here... 😂), I realized that both mosaics actually have enough overlap to be combined into a single, larger mosaic.

494332015_1386000922642341_348992549436340406_n.png


Unfortunately, since this wasn’t planned in advance, and as you can see in the image, I have a slight framing issue between the two sets — meaning I’d need to crop way too much for the larger mosaic to be of any real interest...


Since I’ve sold the camera in the meantime, waiting for this summer to fill in the gaps isn’t really an option.


So — if any of you happen to have raw data covering all or part of the missing regions and would be willing to share it, I’d be truly grateful! 🙂
It doesn’t have to cover every missing part — just enough to avoid excessive cropping in the final mosaic (especially sparing NGC 7000...).


Ideally, I’d need all three SHO channels; and if the data was taken with a refractor (for star profiles), that would be even better.
My sampling is 2"/px, so anything reasonably close would work fine.


Thanks a lot in advance, and feel free to contact me here or via PM! 🙂


Clear skies to all,
JB (aka “the framing king” 🙂)
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Jean-Baptiste_Paris 12.69
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Well, no sooner had I posted this here than a solution presented itself!
Thanks for your attention, and see you soon with the final result! ;)
JB
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AstroDarks 0.00
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I have this data if you'd like to use. Let me know! https://app.astrobin.com/u/AstroDarks?i=zamwyz#gallery
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Alan_Brunelle
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JB Auroux:
Hi everyone ! 

Back in summer 2021, I captured a 2-panel mosaic of Sh2-119, and in summer 2023, a 4-panel mosaic of NGC 7000.
Both were done using the same setup and camera (TSA102 + Atik 16200).


While stitching the Sh2-119 tiles this weekend (yes, 4 years after acquisition — no rush here... 😂), I realized that both mosaics actually have enough overlap to be combined into a single, larger mosaic.

494332015_1386000922642341_348992549436340406_n.png


Unfortunately, since this wasn’t planned in advance, and as you can see in the image, I have a slight framing issue between the two sets — meaning I’d need to crop way too much for the larger mosaic to be of any real interest...


Since I’ve sold the camera in the meantime, waiting for this summer to fill in the gaps isn’t really an option.


So — if any of you happen to have raw data covering all or part of the missing regions and would be willing to share it, I’d be truly grateful! 🙂
It doesn’t have to cover every missing part — just enough to avoid excessive cropping in the final mosaic (especially sparing NGC 7000...).


Ideally, I’d need all three SHO channels; and if the data was taken with a refractor (for star profiles), that would be even better.
My sampling is 2"/px, so anything reasonably close would work fine.


Thanks a lot in advance, and feel free to contact me here or via PM! 🙂


Clear skies to all,
JB (aka “the framing king” 🙂)

You certainly would not need data from exactly the same camera to achieve a nice result. 

I have seen a decent number of "partial" mosaics displayed on AB while users are still in the processing mode.  But more rarely have I seen completed projects where the crop, or lack of cropping is displayed on purpose in the final display.  I think there are also well-known Hubble images that are done that way.  It is not commonly done, but I have kind of warmed to those presentations.  At least some of them.  Here, I think your mosaic does not lend itself to that sort of presentation with the data you have, but with a few more fields/frames, it might make a nice presentation.  I remember back in the day (decades ago) that print photos sometimes were presented with black borders.  This was also an artistic approach to highlight two things: 1. the black border itself made for a framing or effective matting of the image, 2. The black border was a verification that the full film frame was being displayed and that no cropping was done in the printing process.  This second point was a means for the photographer to brag that they had framed the subject perfectly during the shoot, rather than being lazy and crop after the fact, I suppose...!
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