Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Great Nebula in Andromeda  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 221  ·  NGC 224
M31 - 7, 9  & 12 September 2015, Steve Milne
M31 - 7, 9  & 12 September 2015
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M31 - 7, 9 & 12 September 2015

M31 - 7, 9  & 12 September 2015, Steve Milne
M31 - 7, 9  & 12 September 2015
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M31 - 7, 9 & 12 September 2015

Equipment

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Acquisition details

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Description

I've been back and forth with the processing on this one. I was never very happy with my Ha captures. I think the exposures (10 mins) might have been too short and as a result the Ha was very noisy. (It was my first attempt at capturing and processing Ha.)

I went back to a 'non-Ha' version. Then I added the 'with-Ha' version as a layer in Photoshop. I masked out all of this image and then painted in the Ha regions on the mask. I applied a Gaussian blur to this mask and then reduced the opacity somewhat. I'm not all that sure about the colour balance, but it is what it is. The background sky appears to be neutral - at least that's what the PS eyedropper tool is telling me.

Revision E: Weather so bad at the moment I decided to rework some older data.

Revision F: As per E, but with slightly more data in core.

Revision G: Core of D blended with F.

Comments

Revisions

  • M31 - 7, 9  & 12 September 2015, Steve Milne
    Original
  • M31 - 7, 9  & 12 September 2015, Steve Milne
    B
  • M31 - 7, 9  & 12 September 2015, Steve Milne
    C
  • M31 - 7, 9  & 12 September 2015, Steve Milne
    D
  • M31 - 7, 9  & 12 September 2015, Steve Milne
    E
  • M31 - 7, 9  & 12 September 2015, Steve Milne
    F
  • Final
    M31 - 7, 9  & 12 September 2015, Steve Milne
    G

Sky plot

Sky plot

Histogram

M31 - 7, 9  & 12 September 2015, Steve Milne