The Jellyfish Nebula

Jellyfish Nebula

Other names:IC443, Sh2-248
Distance:5000 light years
Date:16-Jan-2020, 21-Jan-2020, 23-Jan-2020
Telescope:TS Optics 65/420 Imaging Star
Field of view:2° 56' x 1° 55'
Cameras:Canon EOS800D, Canon T3i mono mod
Filters:Baader UV/IR-cut, Baader 7nm Ha
Mount:Skywatcher EQ6-R
Guiding:ZWO OAG, Lacerta MGen-II
Exposure time:9h 21min
OSC 72 x 3min
Ha 23 x 15min
Sizes 1920 x 1080 | 5040 x 3288
The seeing was awful. Some OSC images have as much as 6 arcsec FWHM, the best Ha subs are at 3.5 arcsec. Convolution restored ab bit of the image but the brighter stars all show halos. Alas conditions are always poor that time of year so there is not much hope for more detail. The bright yellow star is Propus, the foot of one of the Gemini. So the poor guy is stepping on a Jellyfish.