Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
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Another year, another M81 image, 



    
        

            Frank Kane
Another year, another M81 image
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Another year, another M81 image

Technical card

Imaging telescopes or lenses: Sky-Watcher StarLux 190MN

Imaging cameras: Atik 383L+

Mounts: Software Bisque Paramount MyT

Guiding telescopes or lenses: ZWO 60/280 GuideScope

Guiding cameras: Starlight Xpress Lodestar Autoguider X2

Filters: Astronomik Ha 1.25" 6nm  ·  Astronomik L R G B


Dates:Dec. 22, 2020Dec. 26, 2020Jan. 4, 2021Jan. 5, 2021Jan. 9, 2021Jan. 16, 2021

Frames:
Astronomik Ha 1.25" 6nm: 20x300" -10C bin 1x1
Astronomik Ha 1.25" 6nm: 9x600" -10C bin 1x1
Astronomik Ha 1.25" 6nm: 7x600" -10C
Astronomik L R G B: 71x120" -10C bin 1x1
Astronomik L R G B: 149x240" -10C bin 1x1
Astronomik L R G B: 90x120" -10C bin 2x2

Integration: 19.6 hours

Darks: ~20

Flats: ~6

Bias: ~100

Avg. Moon age: 14.90 days

Avg. Moon phase: 50.49%

Bortle Dark-Sky Scale: 5.00


Basic astrometry details

Astrometry.net job: 4162480

RA center: 9h 55' 21"

DEC center: +69° 3' 28"

Pixel scale: 1.114 arcsec/pixel

Orientation: 84.646 degrees

Field radius: 0.455 degrees


Resolution: 2389x1716

Data source: Backyard

Description

Every year I try to capture a better image of Bode's Galaxy than last. The main difference this time around is darker skies, and a little more processing experience. Not a crazy amount of exposure time on this one, but I was able to pull out a hint of the IFN, and I'm happy with how the Hydrogen-alpha data enhanced the RGB.

Comments

Revisions

  • Another year, another M81 image, 



    
        

            Frank Kane
    Original
  • Another year, another M81 image, 



    
        

            Frank Kane
    B
  • Another year, another M81 image, 



    
        

            Frank Kane
    C
  • Another year, another M81 image, 



    
        

            Frank Kane
    D
  • Final
    Another year, another M81 image, 



    
        

            Frank Kane
    E

B

Description: Played with the color balance a bit.

Uploaded: ...

C

Description: Added another night of exposure time; went lighter on processing

Uploaded: ...

D

Description: Got rid of some vignetting.

Uploaded: ...

E

Description: Less IFN, more contrast

Uploaded: ...

Sky plot

Sky plot

Histogram

Another year, another M81 image, 



    
        

            Frank Kane