Sadr-A (Sh2-108?)
Posted: Fri Jun 18, 2021 3:56 pm
Sh2-108 (aka IC 1318, Butterfly Nebula) is a large nebula centered on the star Sadr. It spans 3 degrees. What I am calling "Sadr-A" is a small part of it that fits my sensor. It is a minor nebula that I find interesting. In fact I think it looks like a Michelangelo sculpture. Last night I enjoyed exceptional seeing, and captured 2.7 hours in 7nm Ha. This is post #1. I will follow-up with proper star colors mixed in at a later date when the Moon passes and the skies clear once again.
The following image is the original Ha data expressed in black & white:
I removed the stars in the next two images, and colorized it. In my next post, when I have star stacks, I'll mix it into each of the following:
Here is everything going into the red channel. This is true color, but I find that it lacks interest:
And here is one unit in the green channel to three units in the red channel. I find this more interesting:
Captured with:
William Optics 71mm f/5.9
50 year old Unitron mount
DIY RA drive with ST-4 interface
Orion 7nm Ha filter: 32x300s
SharpCap 3.1
PHD2
Astro Pixel Processor
Affinity Photo
Brian
The following image is the original Ha data expressed in black & white:
- Sadr-A_Ha-7nm-32x300s-b1-stars-mono.jpg (842.55 KiB) Viewed 2701 times
Here is everything going into the red channel. This is true color, but I find that it lacks interest:
- Sadr-A_Ha-7nm-32x300s-b1-nostars-red.jpg (902.42 KiB) Viewed 2701 times
- Sadr-A_Ha-7nm-32x300s-b1-nostars-yellow.jpg (930.54 KiB) Viewed 2701 times
William Optics 71mm f/5.9
50 year old Unitron mount
DIY RA drive with ST-4 interface
Orion 7nm Ha filter: 32x300s
SharpCap 3.1
PHD2
Astro Pixel Processor
Affinity Photo
Brian