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Sh2-224, 





    
        

            Chris Sullivan
Sh2-224

Sh2-224

Technical card

Resolution: 3893x2902

Dates:Jan. 6, 2018Jan. 10, 2018Jan. 18, 2018Jan. 19, 2018Jan. 23, 2018Jan. 24, 2018Jan. 26, 2018

Frames:
Blue: 50x150" (gain: 150.00)
Green: 54x150" (gain: 150.00)
ZWO H-alpha 7nm: 56x600" (gain: 150.00)
ZWO Red: 51x150" (gain: 150.00)

Integration: 15.8 hours

Avg. Moon age: 9.81 days

Avg. Moon phase: 37.77%

Bortle Dark-Sky Scale: 8.00

Astrometry.net job: 1945949

RA center: 81.662 degrees

DEC center: 42.930 degrees

Pixel scale: 2.082 arcsec/pixel

Orientation: 89.190 degrees

Field radius: 1.404 degrees

Data source: Backyard

Description

Don't zoom in on this one, folks! This was a last minute pick for what to image while waiting for my main targets to rise. I really like this object, but I underestimated its difficulty: First off, it's a little fainter than I thought it was going to be. Secondly, there are SO MANY stars in this field. I really had a tough time merging the Ha data with the red data without destroying the stars. I'm not satisfied with this - it's really noisy and lacks detail, but I'm not going to add more to it since it's galaxy season and I'm itching to take the refractor down and get started on it. I might work on it again next fall/winter if I have my refractor up. If I were to do it over (and I am planning on it someday), I'd give the Ha at least 20 hours and I'd try to construct a bicolor HOO version to make it easier to merge with the star field. Besides - there seems to be an OIII signal in this one I originally wasn't aware of. I really had to pull out all the tricks to get the star size under control. And yet, neither the nebula nor the stars look great. I still continue to struggle with star color when imaging in monochrome.

Comments

Author

Chris-PA
Chris Sullivan
License: None (All rights reserved)
2432
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Revisions

  • Sh2-224, 





    
        

            Chris Sullivan
    Original
  • Sh2-224, 





    
        

            Chris Sullivan
    D
  • Final
    Sh2-224, 





    
        

            Chris Sullivan
    E

E

New noise reduction routine.

Sky plot

Sky plot

Histogram

Sh2-224, 





    
        

            Chris Sullivan