In about 2000 or 2001 there was a planetary conjunction not far from the Sun (8degs or so I think). Phil Alner of Cody Society and I observed Jupiter, Saturn, some stars and (I think) Mars through a Zeiss 160mm f/15 refractor. While the planets were clear and easy (though the glare from the nearby Sun pretty fierce – don’t try this at home kids) I don’t recall seeing any of the moons of Jupiter which are mag 5. I think we decided the limiting mag was 3ish elsewhere on the sky.
It looks intermittently clear here this afternoon. I may give it a try.