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Blue star edit problem Horsehead Nebula

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#1 Seven Grey

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Posted 11 December 2023 - 05:45 PM

my first post to cloudy nights, so please let me know if I'm in the right area. I'm new to telescopes and astrophotography. I bought my Dwarf2 in August and Seestar just arrived a couple weeks ago. I'm just learning Siril and Affinity now. so I'm sure there are lots of newbie mistakes in this edit. this is only my second time editing Horsehead and I don't know what to do about the two giant blown out stars. my original image was a single FITS file pre-stacked internally by the Seestar. In Siril I did crop, background extraction and then green removal and lost most color in my stars on green removal. then when doing photometric color calibration all the color in stars was gone. I did star-removal and saved stars and starless as TIFF. from there I brought the two TIFF files into Affinity for my color edits. the starless edited quite nice I I think with red and orange for horsehead and flame nebula. but in the stars layer I have those two big white spots to deal with. I'm unsure how to get a nice electric blue in those big blown out areas and would love some tutoring and advice. thanks so much in advance for patience in dealing with a newbie like me. ps. this was two hours integration (about 720subs at 10s) and stacked internally w darks by Seestar. I am just editing the out of the box single final FITS file. also, not sure if I'm posting the image here correctly. just let me know

 

HorseHead2023Dec9RotateSM.jpg



#2 DeepSky Di

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Posted 11 December 2023 - 07:01 PM

Great job for a first post!

 

The one in the middle is called the Lump Star by some, and it's actually a little nebula and is supposed to look like that. The giant one top right is Alnitak, a known hazard in this area. It is very bright and will make haloes depending on the filter used and the processing methods.

 

Also, the image is back to front :-)


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#3 Seven Grey

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Posted 12 December 2023 - 09:22 AM

thanks for the info and help. appreciate you pointing out the orientation. not sure why that is happening but I did flip it but concerned maybe that is happening to all my images.

 

any advice for getting the blue in the Lump Star and Alnitak? 




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