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Contains:  Great Nebula in Andromeda, M 110, M 31, NGC 205, NGC 224, Part of the constellation Andromeda (And), The star 22And, The star 41And, The star θAnd, The star μAnd, The star νAnd, The star οCas, The star πAnd, The star πCas, The star σAnd, The star φAnd
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M31 and a small surprise, 


            Dominique Callant
M31 and a small surprise
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M31 and a small surprise

Technical card

Imaging telescopes or lenses: Samyang 135mm f2 135mm F/2

Imaging cameras: Canon 6Da

Mounts: Star Adventurer

Software: ProDigital Software Astronomy Tools Actions Set  ·  ProDigital Software AstroFlat Pro  ·  AstroArt 6  ·  adobe Photoshop CC 2018

Filters: Optolong UHC

Dates:Nov. 2, 2018

Frames:Optolong UHC: 47x120" ISO1600 bin 1x1

Integration: 1.6 hours

Darks: ~25

Flats: ~25

Bias: ~30

Avg. Moon age: 24.09 days

Avg. Moon phase: 29.97%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 19.00

Basic astrometry details job: 2367698

RA center: 0h 40' 11"

DEC center: +41° 11' 27"

Pixel scale: 20.708 arcsec/pixel

Orientation: 267.012 degrees

Field radius: 9.828 degrees

Resolution: 1824x1297

Locations: home backyard, Houthalen, Limburg, Belgium

Data source: Backyard


The weather conditions were not super, so I decide to go for a widefield shot of M31 with the Samyang 135mm and the Canon6Da. While developing the image I noticed a small blue-greenisch dot, upper left of M31. I searched SkiSafari and found out it was comet 64P Swift-Gehrels.
A nice surprise.



Dominique Callant
License: None (All rights reserved)

Sky plot

Sky plot


M31 and a small surprise, 


            Dominique Callant