Hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Great Nebula in Andromeda  ·  M 31  ·  M 32  ·  NGC 221  ·  NGC 224
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M31. The Andromeda Galaxy., 


M31. The Andromeda Galaxy.
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M31. The Andromeda Galaxy.

Technical card

Imaging telescopes or lenses: ED80

Imaging cameras: SBIG ST-10 XME

Mounts: Mountain Instruments MI-250

Guiding cameras: SBIG ST-10 XME

Software: PixInsight  ·  Maxim DL

Filters: Xagyl Comm 1.25" B  ·  Xagyl Comm 1.25" Red  ·  Xagyl Comm 1.25" G

Accessory: Astro-Tech 2" Field Flattener  ·  SBIG CFW 10  ·  Moonlite CF 2" focuser with high resolution stepper

Dates:Aug. 31, 2013Sept. 1, 2013Sept. 3, 2013

Xagyl Comm 1.25" B: 50x180" (2h 30') -12C bin 1x1
Xagyl Comm 1.25" G: 60x180" (3h) -12C bin 1x1
Xagyl Comm 1.25" Luminance: 30x600" (5h) -10C bin 1x1
Xagyl Comm 1.25" Red: 50x180" (2h 30') -10C bin 1x1

Integration: 13h

Darks: 20

Flats: 15

Bias: 175

Avg. Moon age: 26.12 days

Avg. Moon phase: 13.68%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 6.01

Mean FWHM: 3.50

Temperature: 28.00

Basic astrometry details

Astrometry.net job: 152468

RA center: 00h42m54s.7

DEC center: +41°1546

Pixel scale: 2.315 arcsec/pixel

Orientation: 98.580 degrees

Field radius: 0.802 degrees

Resolution: 620x413


M31, The Andromeda Galaxy. Represents about 3 hours of data (RGB) collected over the last few nights. I've been steadily working towards an automated setup based around CCD Commander and my Foster Systems Roof Controller/Weather Station. This data was really just a bonus as the idea was to make sure the roof would open and close on its own with no user intervention. This also was a test case for switching to Focus Max. I had previous problems with it and was not looking forward to attempting it, but after following their new(er) HOWTO, it makes much more sense and worked.

Of note, I did do something I don't normally do to process this. I took out the luminance portion of the image early on and ran deconvolution on it. It really steadied up the stars and made it 'cleaner'. I think I will try this on future images and see how it comes out.



  • Final
    M31. The Andromeda Galaxy., 


  • M31. The Andromeda Galaxy., 


  • M31. The Andromeda Galaxy., 


  • M31. The Andromeda Galaxy., 


  • M31. The Andromeda Galaxy., 



Sky plot

Sky plot


M31. The Andromeda Galaxy.,