Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  B152  ·  B354  ·  Sh2-129  ·  VdB140
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Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 



    
        

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

Getting plate-solving status, please wait...
Flying Bat and Squid - Sh2-129 and OU4 - Bicolor Narrowband, 



    
        

            Nico Carver
Powered byPixInsight

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

Imaging Telescopes Or Lenses
Canon 200 mm f/2.8 L II USM
Imaging Cameras
ZWO ASI1600MM-Cool
Mounts
Orion Atlas EQ-G
Filters
Astrodon Tru-Balance 1.25" 5nm Ha · Astrodon Tru-Balance 1.25" 3nm OIII
Accessories
Shoestring Astronomy EQDIR
Software
PHD2 Guiding · Pixinsight 1.8 · Photoshop CS6 · Main Sequence Software Sequence Generator Pro · Cartes du Ciel
Guiding Telescopes Or Lenses
Orion 50mm Guide Scope with helical focusing
Guiding Cameras
QHYCCD 5L-II M

Acquisition details

Dates:
Aug. 16, 2017 ·  Aug. 18, 2017 ·  Aug. 24, 2017 ·  Aug. 27, 2017
Frames:
Astrodon Tru-Balance 1.25" 3nm OIII: 40x600" (6h 40') (gain: 200.00) -15°C bin 1x1
Astrodon Tru-Balance 1.25" 5nm Ha: 35x300" (2h 55') (gain: 139.00) -15°C bin 1x1
Integration:
9h 35'
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

RA center: 21h10m38s.32

DEC center: +60°0540.1

Pixel scale: 2.700 arcsec/pixel

Orientation: -10.295 degrees

Field radius: 2.675 degrees

More info:Open 

Resolution: 5500x4542

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

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

Description: Slight changes to colors that I think I like better.

Uploaded: ...

C

Description: 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.

Uploaded: ...

Sky plot

Sky plot

Histogram

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



    
        

            Nico Carver