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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205
Getting plate-solving status, please wait...
M31 (The Andromeda Galaxy), 


            Eric Solís
M31 (The Andromeda Galaxy)

M31 (The Andromeda Galaxy)

Technical card

Resolution: 4544x3440

Dates:Nov. 24, 2017

ZWO B 36mm: 13x60" (gain: 139.00) -20C bin 1x1
ZWO G 36mm: 13x60" (gain: 139.00) -20C bin 1x1
ZWO Ha 36mm: 27x120" (gain: 139.00) -20C bin 1x1
ZWO L 36mm: 80x10" (gain: 139.00) -20C bin 1x1
ZWO L 36mm: 80x20" (gain: 139.00) -20C bin 1x1
ZWO L 36mm: 88x45" (gain: 139.00) -20C bin 1x1
ZWO R 36mm: 10x60" (gain: 139.00) -20C bin 1x1

Integration: 3.3 hours

Darks: ~20

Flats: ~25

Bias: ~110

Avg. Moon age: 5.38 days

Avg. Moon phase: 29.30%

Bortle Dark-Sky Scale: 5.00

Temperature: 30.00 job: 1835738

RA center: 0h 42' 26"

DEC center: +41° 20' 31"

Pixel scale: 1.036 arcsec/pixel

Orientation: 265.857 degrees

Field radius: 0.820

Locations: Backyard, Milford, MA, United States


My first attempt at M31 with my new scope and ZWO ASI1600MM camera. I'm not happy with the result at this point, I think I tried to get too much out of the processing with not enough detain the HaRGB channels, although the L channel has a reasonable amount of data. I definitely need spend some more time in the back yard to get this where I'm happy with it. However, this is an improvement on my previous results with M31 using my DSLR, so I'm posting it as a stepping stone in my progression as an astrophotographer.



Eric Solís
License: None (All rights reserved)


  • M31 (The Andromeda Galaxy), 


            Eric Solís
  • Final
    M31 (The Andromeda Galaxy), 


            Eric Solís


I like this version much more than the first, though it still needs work. I removed the local histogram equalization on the L channel, which gives the image a much softer and more natural look. I also removed the green tint I ended up with in the final version using the magic of SCNR. Now I'm really excited to see what this looks like after I gather some more data!

Sky plot

Sky plot


M31 (The Andromeda Galaxy), 


            Eric Solís