IC 443, Jellyfish Nebula ( Rob Foster )

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IC 443, Jellyfish Nebula

Imaging Telescopes Or Lenses: Sky-Watcher Esprit 100ED
Imaging Cameras: Canon EOS 80D (modified)
Mounts: Sky-Watcher EQ6-R Pro
Accessories: Optec FocusLynx DirectSync SV · Pegasus Astro Ultimate Powerbox 2 · Sky-Watcher Flattener for Esprit 100 (20188)
Software: Adobe Photoshop · AstroSharp Ltd SharpCap · Bill Blanshan Star reduction methods · Green Swamp Software Green Swamp Server · Pleiades Astrophoto PixInsight · ProDigital Software Astronomy Tools Actions Set · Russell Croman Astrophotography NoiseXTerminator · Russell Croman Astrophotography StarXTerminator · Stefan Berg Nighttime Imaging 'N' Astronomy (N.I.N.A. / NINA)
Guiding Telescopes Or Lenses: Sky-Watcher Evoguide 50ED
Guiding Cameras: ZWO ASI290MM Mini

Dates:: Nov. 9, 2022
Frames:: 95×180″(4h 45′) ISO800
Integration:: 4h 45′
Darks:: 40
Flats:: 40
Flat darks:: 40
Bias:: 50
Avg. Moon age:: 15.77 days
Avg. Moon phase:: 98.87%
Bortle Dark-Sky Scale:: 7.00
Temperature:: 18.00

RA center: 06h17m39s.12

DEC center: +22°50′09″.9

Pixel scale: 1.017 arcsec/pixel

Orientation: -0.815 degrees

Field radius: 1.094 degrees

WCS transformation: thin plate spline

More info:Open

Resolution: 4875x6024

File size: 8.2 MB

Locations: Mason, OH, Mason, OH, United States

Data source: Backyard

This was difficult to process largely because of the large halo around Tejat Prior, or 7 eta gem, on the far right side of the image. I went back to the starless image (after StarXTerminator) and used Clone Stamp to attenuate the globe of orange that carried into the starless image, which helped a bit. Once again, the processing of the undrizzled image was easier and (in my hands) better that the drizzled image. I am dithering every 3 frames, and using default drizzle settings (Scale 2, 0.9, square) but am starting to think about skipping the DI as part of the standard workflow. Besides, in the end, with Bill Blanshan's outstanding star reduction formulas, I am not sure the benefits of the drizzle are noticeable in the final images.

N.I.N.A. Users
DSLR and mirrorless astrophotography

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Advanced success
Started	...
Astrometry.net job	6620023
PixInsight job	MC1PU37IXVATRYNGSUP4F42L6UN40462
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h17m39s.12
RA (top/left)	06h20m35s.69
RA (top/right)	06h14m35s.89
RA (bottom/right)	06h14m44s.21
RA (bottom/left)	06h20m40s.23

Dec (center)	+22°50′09″.9
Dec (top/left)	+23°41′29″.8
Dec (top/right)	+23°40′20″.3
Dec (bottom/right)	+21°58′26″.2
Dec (bottom/left)	+21°59′37″.9

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IC 443, Jellyfish Nebula

IC 443, Jellyfish Nebula

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IC 443, Jellyfish Nebula

IC 443, Jellyfish Nebula

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