Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Bode's galaxy  ·  Bode's nebulae  ·  M 81  ·  NGC 3031
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M81 "Bode's Nebula.", Pat Rodgers
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M81 "Bode's Nebula."

Getting plate-solving status, please wait...
M81 "Bode's Nebula.", Pat Rodgers
Powered byPixInsight

M81 "Bode's Nebula."

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Acquisition details

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Description

1st look at Bode's for a while.

HaLHaRGB moon4 days to full.

Ha 2x900 4x600, L 6x600, R 10x300, G 10x300, B 10x300. 4h 40mins total

Rev2: Added 4hrs 30mins next evening. Now 9hrs 10minutes.

L: 14x600s R: 10x300s 6x600s G: 10x300s 6x600s B: 10x300s 6x600s Ha: 2x900s 4x600s

Hopefully get some more Lum and Ha next clear.

3 clear nights on the bounce 1st time that's happened all year. Only downer is the hear full moon in the South.

Added another 16x600s Lum plus 30x120s Luminance for the core, and 3x600s Ha before dawn broke.

Rev C: Is the 5hrs of Lum with the 1hour of 2minute subs combined using HDR composition in Pixinsight.

Rev D: Is the final image totalling 13hrs 10 minutes of data.

Rev E: Less bright and stars are not as washed of colour. Re-did processing without a de-convolution.

Rev F: Re-processed 16th Aug 16. Lots of new techniques learnt and tried to apply in this rendition. Amazing how every time you re-do the same data it always looks different :-)

Rev G: 20thApr17 reprocess. Went back to pixel maths school after my astro break. In this I combined the Luminance by extracting the L,a,b channels from my HaRGB combination then added the LuminanceHDR (120sx30subs with the 600s) in place of the L and recombined them, using Gerald Wechselberger's method which can be found in his brilliant tutorials here.

http://www.werbeagentur.org/oldwexi/PixInsight/PixInsight.html

Comments

Revisions

  • M81 "Bode's Nebula.", Pat Rodgers
    Original
  • M81 "Bode's Nebula.", Pat Rodgers
    B
  • M81 "Bode's Nebula.", Pat Rodgers
    C
  • M81 "Bode's Nebula.", Pat Rodgers
    D
  • M81 "Bode's Nebula.", Pat Rodgers
    E
  • M81 "Bode's Nebula.", Pat Rodgers
    F
  • M81 "Bode's Nebula.", Pat Rodgers
    G
  • M81 "Bode's Nebula.", Pat Rodgers
    H
  • Final
    M81 "Bode's Nebula.", Pat Rodgers
    I

H

Description: Same old data 2018 reprocess.

Uploaded: ...

I

Description: Another reprocess of this old data. A convolution of the Luminance. The RGB was photometric colour balanced.
A HaL-HaRGB

Uploaded: ...

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Histogram

M81 "Bode's Nebula.", Pat Rodgers