I think what I find interesting about your Uranus and Earth travel together AU is the fallout I imagine happening.
Jupiter: "Uranus, we need to tal- WHY DO YOU HAVE EARTH WITH YOU?!"
Uranus: "He wanted to come with."
Jupiter: "...Oh, Sun is so gonna kill you."
Hiiiiii!!!!! Thanks for the ask!!!!
The most funny part is that, in this specific au, since Earth already found him, Caelus would be much more aware of his surroundings, so he'd make it 10x more difficult for Jupiter to find him, since he is specifically avoiding being found.
So, by the time Jupiter finds them(if he does :)) They will be very, very far.
Caelus: And what is the Sun going to do? We're not even going back!
Jupiter: What-
Caelus: Bye!
Thanks for the ask!!!
(I will need a name for this au)