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Hemisphere:  Northern  ·  Contains:  Andromeda Galaxy, M 110, M 31, M 32, NGC 205, NGC 221, NGC 224
Getting plate-solving status, please wait...
M31 revisit, 


            Paul Garais
M31 revisit
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M31 revisit

Technical card

Imaging telescopes or lenses: SkyWatcher Esprit 100 ED f/5.5 APO

Imaging cameras: QHYCCD QHY268C

Mounts: Skywatcher EQ6-R Pro

Guiding telescopes or lenses: SkyWatcher Esprit 100 ED f/5.5 APO

Guiding cameras: ZWO ASI290MM mini

Software: N.I.N.A.  ·  PixInsight

Accessory: SkyWatcher Field Flattener

Dates:Sept. 11, 2020

Frames: 55x300" (gain: 60.00) -10C bin 1x1

Integration: 4.6 hours

Darks: ~100

Flats: ~100

Bias: ~300

Avg. Moon age: 23.19 days

Avg. Moon phase: 38.95%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details job: 3840107

RA center: 0h 42' 46"

DEC center: +41° 16' 15"

Pixel scale: 1.402 arcsec/pixel

Orientation: 269.225 degrees

Field radius: 1.433 degrees

Resolution: 6137x4061

Locations: Backyard, Sendenhorst, Germany

Data source: Backyard


I revisited M31 after two years, just to see, what I can get out of it in one night. I also used several new processing approaches I did not use before, like fully separate editing of stars and object after stretching (StarNet++ ist just awesome) and switching early to Photoshop.

Obviously there are some flaws and things to improve:
- Wrong spacing between reducer and sensor and also some tilt
- I should have imaged the stars separately with a shorter exposure time and at GAIN 0
- As soon as my imaging train is corrected, I will triple the integration time

Maybe the items, that are on back-order, will arrive early enough to make a second go this year :).



Paul Garais
License: Attribution-NonCommercial-ShareAlike Creative Commons

Sky plot

Sky plot


M31 revisit, 


            Paul Garais

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