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Contains:  IC 443, IC 444, Part of the constellation Gemini (Gem), The star Propus (ηGem), The star μGem
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Jellyfish OSH, 


            John Willis
Jellyfish OSH
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Jellyfish OSH

Technical card

Imaging telescope or lens:Takahashi FSQ106ED

Imaging camera:ZWO ASI1600MM-Cool

Mount:iOptron CEM 60

Guiding telescope or lens:PrimaLuceLab 60mm CompactGuide scope

Guiding camera:QHYCCD 5L-II M

Focal reducer:Takahashi Reducer 0.60 f/3.0

Software:Seqence Generator ProPixInsight

Filters:ZWO SII 31mm 7nmZWO Ha 7nmZWO Oiii 31mm

Dates:Feb. 1, 2020

Frames: 60x300"

Integration: 5.0 hours

Avg. Moon age: 6.87 days

Avg. Moon phase: 44.53%

Basic astrometry details job: 3236686

RA center: 6h 19' 31"

DEC center: +22° 46' 15"

Pixel scale: 2.440 arcsec/pixel

Orientation: 178.572 degrees

Field radius: 1.929 degrees

Resolution: 4546x3426

Locations: Backyard, Plano, Texas, United States

Data source: Backyard


The Jellyfish nebula, shot in narrowband from the backyard. I assigned the OSH narrowband filters to RGB respectively to give an underwater feel to the color scheme.

There is also an asteroid in this image. Look for the streak in 3 colors about a third of the way in and down from the top left corner. That's 389 Industria, which slowly passed through my field during the night's shooting.



John Willis
License: Attribution-NonCommercial Creative Commons

Sky plot

Sky plot


Jellyfish OSH, 


            John Willis