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Jupiter 03.07 and unidentified shadow


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I've been playing with capturing/processing Jupiter at f/20 and f/15. The images aren't super good, but I noticed I got a "shadow" on the planet, but I can't see any moon that could cast it - both Io and Calisto on the left, "sunny" side are emerging from beneath Jupiter not transiting in front of him - so what is making the shadow that is on f/20 and f/15 shots?





mysterious shadow:






DMK21 with filter threaded focal reducer and shor nosepiece - all moons:


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Nice images.

The shadow isn't a moon as far as im aware - although I think Io's shadow was going across the disk earlier.

The shadow is in the EZ - not somewhere you would normally see a dark spot.

You could have something there !

CM of system I at your obs time was 85 degrees approx.

Could be good to see if it is still there when that CM comes round again, or if it has changed

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