Imaging telescopes or lenses: TS-Optics TS 100 Quadruplet
Imaging cameras: ZWO ASI1600MM-C
Mounts: SkyWatcher EQ6 PRO GOTO
Guiding telescopes or lenses: Orion 80/400
Guiding cameras: Orion Starshoot autoguider
Software: PHD Lab PhD 2 Guiding · Pleyades Astrophoto PixInsight Ripley · Main Sequence Software SGPro · Sequence Generator Pro · Photoshop
Filters: Astrodon R Gen.2 E-series 36mm · Astrodon G Gen.2 E-series 36mm · Astrodon B Gen.2 E-series 36mm · Astrodon L Gen.2 E-series 36mm · Astrodon Ha 3nm 36mm
Accessory: PrimaLuceLab Sesto Senso focuser · ScopeDome 3M · ZWO Filterwheel EFW 7x 36mm
Dates:Aug. 5, 2020 , Sept. 18, 2020
Frames:
Astrodon B Gen.2 E-series 36mm: 180x120" (gain: 76.00) -20C bin 1x1
Astrodon G Gen.2 E-series 36mm: 180x120" (gain: 76.00) -20C bin 1x1
Astrodon Ha 3nm 36mm: 220x600" (gain: 76.00) -20C bin 1x1
Astrodon L Gen.2 E-series 36mm: 540x120" (gain: 76.00) -20C bin 1x1
Astrodon R Gen.2 E-series 36mm: 180x120" (gain: 76.00) -20C bin 1x1
Integration: 72.7 hours
Darks: ~50
Flats: ~30
Bias: ~50
Avg. Moon age: 8.87 days
Avg. Moon phase: 49.06%
Bortle Dark-Sky Scale: 4.00
Temperature: 12.50
Astrometry.net job: 3977563
RA center: 0h 42' 7"
DEC center: +41° 18' 52"
Pixel scale: 1.343 arcsec/pixel
Orientation: 90.439 degrees
Field radius: 2.674 degrees
Resolution: 11674x8311
Locations: Home Observatory, Ayent, Valais, Switzerland
Data source: Own remote observatory
Remote source: Non-commercial independent facility
The Andromeda Galaxy also known as Messier 31, M31, or NGC 224 and originally the Andromeda Nebula, is a barred spiral galaxy approximately 2.5 million light-years from Earth and the nearest major galaxy to the Milky Way. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation of Andromeda, which itself is named after the Ethiopian (or Phoenician) princess who was the wife of Perseus in Greek mythology.
Source: Wikipedia
During this autumn, I decided to go big with a 9-panel mosaic of the M31 region. At first, I wanted to show the Ha clouds surrounding the galaxy but quickly abandoned the idea. After more than 10 hours on a panel and no sign of nebulosity, I realized that this will take me years to come to a result. So, I finished the project and used the Ha to enhance nebulae contained in M31. The guider messed up and I had to disable dithering… There is a lot of walking noise on a few lower frames.
This picture is the result of several post-processing iterations. I always struggle with LRGB. If someone knows or uses a good tutorial, please tell me its name!
Zoom in, enjoy! Criticism and advice are welcome!
Description: Reduce halos around stars, resaturate every element in the image using range and star masks generated with PixInsight.
Uploaded: ...
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