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 OIII 3nm 36mm · Astrodon Ha 3nm 36mm · Astrodon SII 3nm 36mm
Accessory: PrimaLuceLab Sesto Senso focuser · ScopeDome 3M · ZWO Filterwheel EFW 7x 36mm
Dates:Nov. 11, 2020 , Nov. 14, 2020 , Nov. 16, 2020
Frames:
Astrodon Ha 3nm 36mm: 80x300" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm 36mm: 50x300" (gain: 200.00) -20C bin 1x1
Astrodon SII 3nm 36mm: 50x300" (gain: 200.00) -20C bin 1x1
Integration: 15.0 hours
Darks: ~50
Flats: ~30
Bias: ~50
Avg. Moon age: 18.47 days
Avg. Moon phase: 7.52%
Bortle Dark-Sky Scale: 4.00
Temperature: 5.00
Astrometry.net job: 4015590
RA center: 1h 0' 13"
DEC center: +60° 46' 13"
Pixel scale: 1.345 arcsec/pixel
Orientation: -91.814 degrees
Field radius: 1.061 degrees
Resolution: 4539x3414
Locations: Home Observatory, Ayent, Valais, Switzerland
Data source: Own remote observatory
Remote source: Non-commercial independent facility
IC63 and IC59 are two diffuse nebulae in the constellation Cassiopeia at about 600 lightyears. These clouds are only 3 or 4 lightyears away from the bright star Gamma Cas. Its ultraviolet radiation is slowly dissipating them and ionize the surrounding gas, making it shine.
We often see these nebulae in HaLRGB, that’s why I decided to improve a little bit and make a SHO image! Actually, a few people did it before ^^. I was later surprised to see how much Sii there was in these clouds of glowing gas. In fact, there’s a strong signal near every edge of the nebula, which is translated as bright orange/yellow in this image. It’s not too obvious here because Ha is also strong in these regions. Oiii is almost inexistent. The artifacts around the bright star are not due to processing. It’s actually due to the ZWO ASI1600 glass in front of the sensor (from what I read on forums).
Overall, I’m happy with this image. Details are fine, and the noise kept under control. As always, advice and criticism are welcome!
| Imagers of Switzerland |
| ZWO ASI1600MM/QHY163M |
| The refractors! |
| Narrowband imaging |
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