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Contains:  M 13, Great Cluster in Hercules, NGC 6205
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M13 w/propeller, 





    
        

            bobzeq25
M13 w/propeller

M13 w/propeller

Technical card

Resolution: 2624x1968

Dates:June 9, 2018

Frames:Astronomik RGB Deep Sky: 112x60" -10C bin 1x1

Integration: 1.9 hours

Flats: ~90

Bias: ~100

Avg. Moon age: 24.79 days

Avg. Moon phase: 23.32%

Bortle Dark-Sky Scale: 7.00

Mean FWHM: 3.00

Temperature: 18.00

Astrometry.net job: 2716738

RA center: 16h 41' 25"

DEC center: +36° 25' 8"

Pixel scale: 1.002 arcsec/pixel

Orientation: 260.520 degrees

Field radius: 0.457

Data source: Backyard

Description

Like the fact that I captured the propeller dark lanes, just above and left of center.

R 20X120, G 38X60, B 23X90 (no L).

Comments

Author

bobzeq25
bobzeq25
License: None (All rights reserved)
14162
Like

Revisions

  • M13 w/propeller, 





    
        

            bobzeq25
    Original
  • M13 w/propeller, 





    
        

            bobzeq25
    C
  • M13 w/propeller, 





    
        

            bobzeq25
    F
  • M13 w/propeller, 





    
        

            bobzeq25
    G
  • M13 w/propeller, 





    
        

            bobzeq25
    H
  • Final
    M13 w/propeller, 





    
        

            bobzeq25
    I

C

A bit better color, more outer stars, and better background.

F

One could play with this data for a long time.

G

Some CN people actually liked C better than F, thought F was too pale. I found C too cartoonish. This is in between.

H

Still fiddling. How black/grey should the background be?

I

In looking at others images, I thought I either hadn't captured well, or understretched (which was clearly the case). I think part of it was not wanting to burn out the core (and part was inadequate gradient reduction). Comments are solicited on whether I should go back and try to lessen the core; or, does it look "natural"?

Sky plot

Sky plot

Histogram

M13 w/propeller, 





    
        

            bobzeq25