The Cygnus Loop/Veil Nebula This is my first attempt at a…
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The Cygnus Loop/Veil Nebula
This is my first attempt at a mosaic and I think the additional time taken was well worth it. When I started this hobby a year ago I spent a whole month on this target and never got a result I was happy with.
The Cygnus Loop/Veil Nebula (2-Panel Mosaic)
Southeastern MA (Bortle 6-7)
August/September 2026
Camera: Canon Ra
Telescope: William Optics GT81 IV
Optics: Stellarvue SFFX1 Flattener
Mount: Sky-Watcher EQM-35 Pro
Guide: ZWO ASI120mm Mini + William Optics 50mm uniguide
Filter: Svbony SV220 7nm Ha/OIII & unfiltered (Broadband Stars)
Control and Guiding: Mele Quieter 4C running N.I.N.A., PHD2, Green Swamp Server
Exposure: Per Panel:
Ha/OIII: 300s × 180 subs (15 hours) Broadband Stars: 30s × 120 subs (1 hour)
Total Integration: 32 Hours
ISO: 1600 (Narrowband) / 400 (Broadband)
Calibration: Darks, Flats, Synthetic Bias
Siril: Channel extraction, linear denoising, deconvolution, StarNet++ star removal, sequence registration & 2-panel mosaic alignment, PixelMath, GHS stretch
Photoshop: Selective color adjustments, local contrast curves, and broadband RGB star recombination.
#space
source
This is my first attempt at a mosaic and I think the additional time taken was well worth it. When I started this hobby a year ago I spent a whole month on this target and never got a result I was happy with.
The Cygnus Loop/Veil Nebula (2-Panel Mosaic)
Southeastern MA (Bortle 6-7)
August/September 2026
Camera: Canon Ra
Telescope: William Optics GT81 IV
Optics: Stellarvue SFFX1 Flattener
Mount: Sky-Watcher EQM-35 Pro
Guide: ZWO ASI120mm Mini + William Optics 50mm uniguide
Filter: Svbony SV220 7nm Ha/OIII & unfiltered (Broadband Stars)
Control and Guiding: Mele Quieter 4C running N.I.N.A., PHD2, Green Swamp Server
Exposure: Per Panel:
Ha/OIII: 300s × 180 subs (15 hours) Broadband Stars: 30s × 120 subs (1 hour)
Total Integration: 32 Hours
ISO: 1600 (Narrowband) / 400 (Broadband)
Calibration: Darks, Flats, Synthetic Bias
Siril: Channel extraction, linear denoising, deconvolution, StarNet++ star removal, sequence registration & 2-panel mosaic alignment, PixelMath, GHS stretch
Photoshop: Selective color adjustments, local contrast curves, and broadband RGB star recombination.
#space
source
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