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Contains:  NGC 5477, NGC 5474, M 101, NGC 5457
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M101 Wide-field, 





    
        

            Glenn Diekmann
M101 Wide-field

M101 Wide-field

Technical card

Resolution: 4099x3042

Dates:June 21, 2018

Frames:
Astrodon Blue Tru-Balance E-Series Gen 2: 17x60" (gain: 76.00) -10C bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 17x60" (gain: 76.00) -10C bin 1x1
Astrodon Luminance E-Series Gen 2: 54x30" (gain: 76.00) -10C bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 17x60" (gain: 76.00) -10C bin 1x1

Integration: 1.3 hours

Darks: ~50

Flats: ~25

Bias: ~200

Avg. Moon age: 8.46 days

Avg. Moon phase: 61.33%

Bortle Dark-Sky Scale: 7.00

Astrometry.net job: 2149465

RA center: 210.946 degrees

DEC center: 54.106 degrees

Pixel scale: 1.096 arcsec/pixel

Orientation: 269.225 degrees

Field radius: 0.777 degrees

Data source: Backyard

Description

I captured this target during a waxing gibbous moon while I was troubleshooting the guiding of my mount. I decided to process the data just to see how good I could make bad data look.

The signal to noise ratio on the individual subframes was terrible. The stacked data was only marginally better due to heavy LP and the 1.3 hour integration time. The biggest challenge was the incredible amount of noise. To achieve the image seen here, I had to beat the data mercilessly until it yielded an acceptable result. ;)

Comments

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Glenn Diekmann
License: None (All rights reserved)
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M101 Wide-field, 





    
        

            Glenn Diekmann