Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's Galaxy  ·  M 81  ·  NGC 3031
M 81 (Bode's Galaxy), Jussi Saarivirta
M 81 (Bode's Galaxy)
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M 81 (Bode's Galaxy)

M 81 (Bode's Galaxy), Jussi Saarivirta
M 81 (Bode's Galaxy)
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M 81 (Bode's Galaxy)

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Description

M 81, taken from city skies. An experiment of combining HaGB + HaLum to highlight the red details in the galaxy and to somewhat fight the challenges of light pollution. So the red channel has been replaced with narrowband Ha data, and the luminance has been augmented with the Ha data as well. It was interesting to see how high gain short exposures can work out fairly well even in appalling light pollution conditions.

Getting the colors somewhat balanced was the biggest issue as the Ha/Red channel was very prominent because the exposure times were completely different, and heavy editing of curves and hue/saturation was needed. So in that regard the color balance doesn't represent the visual reality and instead was chosen to be visually pleasing.

Comments

Revisions

  • M 81 (Bode's Galaxy), Jussi Saarivirta
    Original
  • Final
    M 81 (Bode's Galaxy), Jussi Saarivirta
    B

B

Description: Enhanced saturation.

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M 81 (Bode's Galaxy), Jussi Saarivirta