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Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 





    
        

            Nico Carver
Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband

Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband

Technical card

Resolution: 5500x4542

Dates:Aug. 16, 2017Aug. 18, 2017Aug. 24, 2017Aug. 27, 2017

Frames:
Astrodon Tru-Balance 1.25" 3nm OIII: 40x600" (gain: 200.00) -15C bin 1x1
Astrodon Tru-Balance 1.25" 5nm Ha: 35x300" (gain: 139.00) -15C bin 1x1

Integration: 9.6 hours

Darks: ~50

Flats: ~40

Bias: ~100

Avg. Moon age: 14.55 days

Avg. Moon phase: 22.34%

Bortle Dark-Sky Scale: 2.20

Mean SQM: 20.79

Astrometry.net job: 2105631

RA center: 317.661 degrees

DEC center: 60.095 degrees

Pixel scale: 2.700 arcsec/pixel

Orientation: 10.377 degrees

Field radius: 2.675 degrees

Data source: Traveller

Description

The most fun and the most frustrating astro-image I've made so far! This is my fourth attempt at narrowband imaging. My first 3 subjects were: Jellyfish, N. America, and Crescent. This one was a LOT harder! Many false starts and missteps both in acquisition and processing. I threw out HOURS of data that wasn’t up to par, and this is my 4th full revision of the processing. I am still not fully happy with it, but each revision had positives and negatives, and I think this is the best balance of those so far. The most fun thing about the making of this image was the data (that I kept) was all captured on my road trip to see the eclipse, so all the data was from fairly dark to very dark sites. It is **very** faint. I used a tone mapping process originally described by J-P Metsavainio, which is why the stars are completely white. Basically all the color data is in the tone maps (which are starless). I then recombined that with the a synthetic Lum made out of Ha and Oiii data combined to bring back in the detail and stars.

Comments

Author

2ghouls
Nico Carver
Like

Revisions

  • Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 





    
        

            Nico Carver
    Original
  • Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 





    
        

            Nico Carver
    B
  • Final
    Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 





    
        

            Nico Carver
    C

B

Slight changes to colors that I think I like better.

C

More color tweaks... better? I think I've realized I am never going to get it looking exactly how I want without RGB data- I might try to gather some later this summer.

Sky plot

Sky plot

Histogram

Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 





    
        

            Nico Carver