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

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M-81, John Leader
M-81
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M-81

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Acquisition details

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Description

Luminance data consists of 80 subframes.
RGB data  consists  of 24 subframes  8 per channel.
HA  data   consists  of 39 subframes.
All subframes are calibrated with dark and bias frames and the  wide band data has also been calibrated with flat fields.
I have added about 1.25 hours more luminence data in April,2022 and reprocessed this image.

Comments

Revisions

  • M-81, John Leader
    Original
  • M-81, John Leader
    B
  • Final
    M-81, John Leader
    C

Sky plot

Sky plot

Histogram

M-81, John Leader