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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, 


            Michel Makhlouta
M31 - The Andromeda Galaxy

M31 - The Andromeda Galaxy

Technical card

Resolution: 3986x3009

Dates:Sept. 28, 2019Oct. 5, 2019Oct. 6, 2019Oct. 7, 2019

ZWO 31mm Ha 7nm: 17x300" (gain: 139.00) -15C bin 1x1
ZWO Blue 31mm: 126x30" (gain: 75.00) -15C bin 1x1
ZWO Green 31mm: 108x30" (gain: 75.00) -15C bin 1x1
ZWO Lum 31mm: 587x30" (gain: 75.00) -15C bin 1x1
ZWO RED 31mm: 118x30" (gain: 75.00) -15C bin 1x1

Integration: 9.2 hours

Darks: ~50

Flats: ~50

Bias: ~200

Avg. Moon age: 13.39 days

Avg. Moon phase: 43.28%

Bortle Dark-Sky Scale: 5.00 job: 3012708

RA center: 0h 42' 41"

DEC center: +41° 15' 14"

Pixel scale: 2.023 arcsec/pixel

Orientation: 271.222 degrees

Field radius: 1.403

Locations: Home, Batroun, North, Lebanon

Data source: Backyard


The infamous Andromeda galaxy, located at 2.5 million light-years from Earth.

The number of stars contained in the Andromeda Galaxy is estimated at one trillion, or roughly twice the number estimated for the Milky Way.

The Milky Way and Andromeda galaxies are expected to collide in around 4.5 billion years.

This is my first attempt at this galaxy, using L(HA+R)GB, as it now mostly fits in my field of view after adding the reducer. I am still working on some upgrades, mainly a tilt adjustment mechanism to fix one of my corners. I think I figured out the spacing finally and mostly the stars are good in other corners now. I am also adding an OAG, let's see how that goes.

I will attempt this again, as it didn't turn out as good as I hoped it would be. In any case, I thought of sharing.

Comments and feedback are always much appreciated.

Clear Skies,



Michel Makhlouta
License: None (All rights reserved)


  • M31 - The Andromeda Galaxy, 


            Michel Makhlouta
  • M31 - The Andromeda Galaxy, 


            Michel Makhlouta
  • M31 - The Andromeda Galaxy, 


            Michel Makhlouta
  • Final
    M31 - The Andromeda Galaxy, 


            Michel Makhlouta


still not very happy about how this turned out. this is my nth iteration from scratch. as with Orion and other infamous targets, it's hard to be satisfied with this one as well.


a final version, for 2019 at least

Sky plot

Sky plot


M31 - The Andromeda Galaxy, 


            Michel Makhlouta