Thru luck of timing, we were able to take advantage of a once in 175-year planetary alignment to allow Voyager 2 to merrily hopscotch from Jupiter to Saturn to Uranus and then to Neptune.
Let’s say we don’t want to wait 175 years for the next Grand Tour, but we still wanted to send a probe to the Ice Giants.
Assume for this thought experiment we want to visit Uranus, and that we want at a minimum to swing by Jupiter for a little extra boost.
What would be the launch window(s) for that.
Same question for Neptune.
(If Saturn also happened to be in the correct place to facilitate either of those, that’s cool, but it doesn’t have to be.)
What would be the expected travel times. (Voyager 2 took nine years for Uranus, and 12 for Neptune.)
[I called it a ‘thought experiment’ because I realize there’s not a chance in heck we’ll ever see another probe to Uranus or Neptune in our lifetime. Not very interesting, too long for travel time, and too much competition for funding]