Mesier 31, largest member of our local group of galaxies, is located in the constellation Andromeda at a distance of about 2.5 million light-years from Earth. The two satellite galaxies are M32 and (lower) M110.
For this picture I have just completely reprocessed my 7 years old data (acquired with a small refractor and DSLR) to get (hopefully) better result.

9/2013 and 6/2020

Optics:

Camera:
Mount:
Guider
Exposure:

Software:

 
APM Apo 107/700

Canon 5D MkII mod.
SW HEQ-5 SkyScan
LVI SmartGuider
11x5 min./ISO 1600

PixInsight, Photoshop

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