Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5447  ·  NGC 5449  ·  NGC 5450  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  NGC 5471  ·  Pinwheel galaxy
Messier 101, James Muehlner
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Messier 101

Messier 101, James Muehlner
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Messier 101

Equipment

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Acquisition details

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Description

I had some issues processing this one, with weird color gradients all over the background. I ended up having to use a paintbrush tool to lightly darken the purple fringing on the left side. I'm not sure if this is a light pollution issue or a flatfield issue or what. I'm not super happy with the final result. This light pollution is really harshing my vibe.

Anyway, I've made some more progress in guiding, and some of the frames stacked here had very small RMS errors. Progress!

Comments

Revisions

  • Messier 101, James Muehlner
    Original
  • Messier 101, James Muehlner
    B
  • Messier 101, James Muehlner
    C
  • Final
    Messier 101, James Muehlner
    F
  • Messier 101, James Muehlner
    G

B

Description: Processed with startools. Trying something new.

Uploaded: ...

C

Description: I think I like a lighter touch on the processing, especially the sharpening. StarTools attempt #2.

Uploaded: ...

F

Description: Ham-handed attempt to make the space between the arms a bit less green...

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G

Description: raw stacked image

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Sky plot

Sky plot

Histogram

Messier 101, James Muehlner

In these collections

Stacked DSO