Ok Plan B:
You can use my Panasonic G7 which has a 4K video mode at 30fps which is as fast as most other astro-cams at similar full resolution. It uses Panasonic's Micro 4/3 sensor (as in, it is believed, the ASI1600MC). Only one possible issue is mechanically coupling it to your scope. I have a Micro4/3 adapter that takes it from the Panasonic Micro4/3 Lens mount on the camera to a Nikon F female Bayonet, which then I have a Nikon Tmount to 48mm x 0.75 T-ring and then to an M48
to 2 inch nose piece.
If you can fit a 2 inch nose piece in your scope then all's well. If not there's a problem as I don't have an M48 to 1.25inch nose piece, only an M42 to 1.25 nose piece.
Nonetheless if you have previously used your Canon 1100D on your scope then that was probably with a T-ring/Nose piece. You could simply unscrew its nose piece as it should have(???) an M48 threaded nose piece and be good to go with the adapter and Nikon bits in between. The flange focal distance for the Canon EF mount (44.0mm) is not that different to the Nikon F, so if you've achieved focus with the Canon, then focus should be achievable at the Nikon Flange Focal distance (46.5mm) as there is probably an extra 2.5mm of travel in the system.
The above suggested configuration would achieve
0.46 arcsec/pixel (as per 1st image below). I also have a 0.72x reducer/adapter that can be used instead of the standard mount adapter to achieve an image scale of
0.33 arcsec/pixel (as per 2nd image below) . This would be good to use when the separation is wide as it currently is now (~25 arcminutes). Then on Saturday/Sunday remove the reducer for better frame fill/image scale and possibly use a 1.4xTC to produce an image scale of
0.24 arcsec/pixel (as per 3rd image below) on Sunday 20DEC when the planets are 12 arcminutes apart and then go crazy, weather permitting on Monday 21DEC add a Barlow or 2xTC to achieve an image scale of
0.16 arcsec/pixel (as per 1st image below) .
0.46 arcsec/pixel
18DEC2020 at 2100
Jupiter-Saturn at ~25 arcminutes apart, Panasonic G7, 0.72x Reducer, 2350mm focal length
NB: Without the reducer the conjunction would be at the extreme corners of the frame albeit with better 0.33 arcsec/pixel image scale
0.33 arcsec/pixel
18DEC2020 at 2100
Jupiter-Saturn at ~25 arcminutes apart, Panasonic G7, NO Reducer, 2350mm focal length
NB: Without the reducer the conjunction is now at the extreme corners of the frame
0.24 arcsec/pixel
20DEC2020 at 2100
Jupiter-Saturn at ~12 arcminutes apart, Panasonic G7, 1.4xTC, 2350mm focal length. The 1.4xTC balances the frame somewhat, but if you don't mind then planets at the extreme edge go for the 2x barlow or TC.
0.16 arcsec/pixel
21DEC2020 at 2100
Jupiter-Saturn at ~7 arcminutes apart, Panasonic G7, 2xTC or Barlow, 2350mm focal length. The 2xTC pushes Callisto a tiny bit out of top of the frame. Some careful reframing/rotation may bring it in to frame but would put everything else at the frame edges. Probably not preferable.
Beyond that.....
Go take some pictures.
Best
JA