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Contains:  Extremely wide field
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Witch Head Nebula - lightness , 





    
        

            georgian82
Witch Head Nebula - lightness

Witch Head Nebula - lightness

Technical card

Resolution: 6669x4703

Dates:Feb. 28, 2017

Frames: 103x180"

Integration: 5.2 hours

Avg. Moon age: 1.98 days

Avg. Moon phase: 4.38%

Astrometry.net job: 1602087

RA center: 76.422 degrees

DEC center: -7.349 degrees

Pixel scale: 2.117 arcsec/pixel

Orientation: -89.157 degrees

Field radius: 2.399 degrees

Locations: Home, Healdsburg, California, United States

Description

This proved to be a very challenging target due to the position in the sky at this time of year. It is positioned in a heavy light polluted area and I lost a lot of contrast and also got very strange gradients that I was not able to resolved in the color picture (due to shooting at f/2.8), so I decided to extract the lightness out of it and work with that.

I imaged at f/2.8 and I applied superbias and darkframe subtraction and no flat frames. There is minor amount of noise reduction.

Comments

Author

georgian82
georgian82
License: None (All rights reserved)
1040
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Revisions

  • Witch Head Nebula - lightness , 





    
        

            georgian82
    Original
  • Witch Head Nebula - lightness , 





    
        

            georgian82
    B
  • Final
    Witch Head Nebula - lightness , 





    
        

            georgian82
    C

Sky plot

Sky plot

Histogram

Witch Head Nebula - lightness , 





    
        

            georgian82