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I agreeImaging telescopes or lenses: Takahashi FSQ-106 ED
Imaging cameras: Starlight Xpress SX-814 Trius Monochrome CCD
Mounts: Sky-Watcher EZ-EQ6 GT
Guiding cameras: Starlight-XPress Lodestar Autoguider
Software: Sequence Generator Pro · Photoshop CS6 · PIXINSIGHT 1.8
Filters: Astrodon 3nm SII · Astrodon 3nm OIII · Ha 3nm · Red · Green · Blue
Accessory: Lakeside Astro Motor Focus System · Starlight Xpress SX 'Maxi wheel' · Starlight Instruments FTF3545B-A Focuser
Dates:March 20, 2018
Frames:
Astrodon 3nm OIII: 26x1800" bin 1x1
Astrodon 3nm SII: 1x1800" bin 1x1
Astrodon 3nm SII: 10x600" bin 2x2
Blue: 20x15" bin 2x2
Green: 20x15" bin 2x2
Ha 3nm: 12x1800" bin 1x1
Ha 3nm: 8x600" bin 2x2
Red: 20x15" bin 2x2
Integration: 22.8 hours
Avg. Moon age: 2.99 days
Avg. Moon phase: 9.76%
Astrometry.net job: 2013058
RA center: 6h 16' 25"
DEC center: +22° 29' 34"
Pixel scale: 1.437 arcsec/pixel
Orientation: 0.054 degrees
Field radius: 0.863 degrees
Resolution: 3310x2778
Locations: The Hills Observatory, Manchester, United Kingdom
Data source: Backyard
Here is my narrowband image of the Jellyfish Nebula with RGB stars.
My aim with this image was to show more of the OIII component and to that end more than half of the integration time was devoted to OIII capture.
The NB images were processed using the tone mapping technique where all the stars are removed, the data is then processed to enhance detail etc and the stars are added back from the RGB data. All calibration and most of the processing was done in PixInsight and star removal and final assembly of the image is performed in Photoshop.
The colours are mapped as follows:
Ha = Red
OIII = Blue
SII = Yellow
Using these colours you can clearly see that the redder nebula in the top left corner (part of the IC444 nebula) is quite different from the more orange colour of the SN remnant. The orange coming from the mix of Ha and SII, there being very little SII in the IC444 nebula visible in this image.
All the NB filters are Astrodon 3nm filters.
I also have a wider field of this nebula in Ha
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