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The Sadr Region - An Ultra Deep View of almost 60hrs!, Stefan Pfleger

The Sadr Region - An Ultra Deep View of almost 60hrs!

Getting plate-solving status, please wait...
The Sadr Region - An Ultra Deep View of almost 60hrs!, Stefan Pfleger

The Sadr Region - An Ultra Deep View of almost 60hrs!

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Description

Back when I started doing Astrophotography, about 2 years ago, I did not realise how much nebula you can find in our nightsky! I already knew about targets like the North American Nebula or the Cresecent Nebula, but to me, these where only bright spots within a lot of nothing back then. Little did I realize they where swimming in a sea of endless Ha but also Oiii and Sii emission nebulae! 

Shooting this target proved to be quite time demanding. I probably didn't need to spend as much time on this target as I did, however I decided to do it anyway. It was still Spring when I started. My only gear was a very sharp 100mm macro lens and a telephoto lens (150-600mm) suffering from low sharpness and differential flexure when guiding (basically guiding was out the question) and thus I had nothing else to shoot really that looked nearly as cool as Cygnus. (Well that's not entirely true XD but I certainly had less targets to choose from than a 400mm scope). The main reason for my slow progress however was the summer months with only 2hrs of Astrodark as well as extremely poor weather in Europe despite having one of the driest Summer in history. In the end, it took me around 4 months, until July to finish this beast of a project. In total i aquired around 60hrs of data in SHO and RGB, split roughly 50/50 among the two panels of this mosaic.

This target was my very first try of the Hubble Palette. I hope it worked out alright, I for myself really loved the colors of that palette on this target. I however also decided to do an Foraxx style dynamic SHO with a custom adjusted formula. Please also check that out in the revisions .

This FOV is incredibly rich of popular targets people shoot. Starting from the bottom left, SH2-112, a lookalike nebula to the pacman can be seen. I swear it looks almost the same!
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Next up, a little bit above this nebula, W63 can be seen, an extremely faint supernova remnant consisting of O3 emissions. my goal was to really make it stand out, however I realized, that it would take a lot more integration time to do so. In the end I settled with it being just avbout visible. It mainly stands out in a starless O3 view, however is still quite noisy and due to my large fov missing most of its structure. Thus I decided against trying to boost that region further in my final image! image.png

Moving further into the core of the image, the heart of the Sadr region is reached, with the star sadr itself. Being a mag 2.2 star, Sadr is among the 100 brightest stars in our skies and thus unfortunately a big PITA for astro photography. I was sadly not able to fully remove its halo. 
Just towards the top right, the crescent nebula (WR136) and WR134 can be seen. Both of these targets are actually Wolf-Rayet stars. WR134, to the right of the preview below, always looks like a Dolphin to me! I did not have enough focal length to resolve the fine structure below it, that's why it doesn't look circular in my preview, but I certainly believe my data would have been deep enough to show that structure. 
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Lastly I also want to showcase the Tulip Nebula. It is in the top right corner of my framing and I think it looks absolutely fantastic! image.png

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Revisions

  • Final
    The Sadr Region - An Ultra Deep View of almost 60hrs!, Stefan Pfleger
    Original
  • The Sadr Region - An Ultra Deep View of almost 60hrs!, Stefan Pfleger
    B

B

Title: Sadr Region in Foraxx Style SHO

Description: Lovely target, so I decided to process two versions of it. This one is definitely more true colors but I prefer the other one XD. The formula I used for this palette was changed on the fly to make it work accordingly.

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The Sadr Region - An Ultra Deep View of almost 60hrs!, Stefan Pfleger