Celestial hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Andromeda galaxy  ·  Great Nebula in Andromeda  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 206  ·  NGC 221  ·  NGC 224
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M31 - Yet another Andromeda shot, Palmito
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M31 - Yet another Andromeda shot

Getting plate-solving status, please wait...
M31 - Yet another Andromeda shot, Palmito
Powered byPixInsight

M31 - Yet another Andromeda shot

Equipment

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Acquisition details

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Description

I started shooting M31 with a tripod, a DSLR and a 400mm lens. First attempt I captured 600 subs of ... Deneb :-D

After learning how to find it I spent entire nights shooting, recentering it every 3min (0.8s subs @ ISO3200). I managed to capture it, but boy those stars looked like 1I/ʻOumuamua :')

The SNR was also terrible. I even tried a 3000 subs with little success apart heating my appartment for 110 hours straight.

Then came the time of the StarAdventurer, I was and still am a noob. Flexure was my world and proper guiding nearly impossible. Let us not talk about noise.

Now I switched to a G11 and an astro camera. I am still struggling, still not satisfied, but I am happy of the progress and am proud to present you my new attempt in shooting M31. I am finally happy with deconvolution (turns out my issues were due to a bad star mask that included nebulosity), and with noise reduction thanks to Jon Ristas wonderful method (PixInsight - Jon Ristas TGVDenoise Applied).

There are optical aberrations in the corners, especially top left. Are those astigmatism?

Also there is what looks like chromatic abberations, a blue spot on top left part of bright white stars. I have been having consistent eccentricity issues with blue and OIII filters. Does this confirm chromatic abberations induced by the lens?

I am looking forward to your comments in English or French, thanks!

Comments

Revisions

  • M31 - Yet another Andromeda shot, Palmito
    Original
  • Final
    M31 - Yet another Andromeda shot, Palmito
    B

B

Description: As my skills improved i reprocessed my previous integration:

** 1 / L **
- DBE
- Deconvolution
- TGV Denoise
- MMT denoise
- Stretch
- Morphological Transformation
- Local Histogram Equalization
- 2 layers sharpening MMT

** 2 / R/G/B **
- DBE
- Linear Fit

** 3 / RGB **
- Channel Combination
- Background Neutralization
- Photometric Color Calibration
- SCNR
- TGV Denoise
- MMT denoise
- Masked Stretch

** 4 / LRGB **
- LRGB Combination
- Curves Transformation

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M31 - Yet another Andromeda shot, Palmito