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NGC7635 - The Bubble Nebula Close-up

Technical card

Resolution: 1080x1080

Dates:Aug. 20, 2019Aug. 23, 2019Aug. 24, 2019Aug. 25, 2019Aug. 28, 2019Sept. 18, 2019Sept. 19, 2019Sept. 26, 2019

Astronomik H-alpha 6nm CCD 1.25": 178x240" (gain: 139.00) -20C bin 1x1
Astronomik OIII 6nm CCD 1.25": 180x240" (gain: 139.00) -20C bin 1x1

Integration: 23.9 hours

Darks: ~50

Flats: ~50

Bias: ~256

Avg. Moon age: 22.59 days

Avg. Moon phase: 46.83%

Bortle Dark-Sky Scale: 5.00 job: 3085407

Data source: Backyard


What happens when a massive star ignites within a dense cloud of hydrogen gas? This kind of thing.

As the bright star within the Bubble Nebula began nuclear fusion, the radiation surged outward and carved out this little enclave of space.

I was working on this image and left the this mix on my desktop as an intermediate step. When I came back to the computer, I thought it looked pretty cool in its own right, cropped way in to the center. Though shot in narrowband, this is HOO palette loosely represents the true color of this object.

I thought it had a very natural look to it. But, I’ll end up spinning this picture a few ways.




Jason Guenzel


NGC7635 - The Bubble Nebula Close-up, 


            Jason Guenzel