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Contains:  M 101, NGC 5457
Getting plate-solving status, please wait...
M 101 from the City, 





    
        

            Glenn Diekmann
M 101 from the City

M 101 from the City

Technical card

Resolution: 4436x3320

Dates:April 24, 2019

Frames:
Astrodon Blue Tru-Balance E-Series Gen 2: 31x120" (gain: 76.00) -10C
Astrodon Green Tru-Balance E-Series Gen 2: 31x120" (gain: 76.00) -10C
Astrodon Luminance E-Series Gen 2: 184x60" (gain: 76.00) -10C
Astrodon Red Tru-Balance E-Series Gen 2: 34x120" (gain: 76.00) -10C

Integration: 6.3 hours

Darks: ~50

Flats: ~16

Bias: ~200

Avg. Moon age: 19.91 days

Avg. Moon phase: 72.87%

Mean SQM: 18.10

Astrometry.net job: 2689129

RA center: 210.793 degrees

DEC center: 54.403 degrees

Pixel scale: 0.535 arcsec/pixel

Orientation: 180.154 degrees

Field radius: 0.412 degrees

Data source: Backyard

Description

As I continue to fine-tune my longer focal length imaging setup, I decided to attempt M 101 from my urban/suburban back yard. As expected, the biggest issue I encountered while processing was noise. I reduced the noise aggressively when the image was linear but found, after the histogram stretch, that I could reduce it no further without compromising the finer details. I decided to leave it a little noisy.

Comments

Author

Starship
Glenn Diekmann
License: None (All rights reserved)
1762
Like

Revisions

  • M 101 from the City, 





    
        

            Glenn Diekmann
    Original
  • Final
    M 101 from the City, 





    
        

            Glenn Diekmann
    B

B

A little more brightness and saturation.

Sky plot

Sky plot

Histogram

M 101 from the City, 





    
        

            Glenn Diekmann