Did you take into account the changes in orbital positions?Nope, but as I understand it Saturn was at an optimal distance when the Saturn probe was sent. Saturn is 9+ AU from the sun. Uranus is 19+ AU. Since we're 1AU, then when we're at the maximum distance from either we add one AU to the distance, and when we're at the closest you subtract 1 AU form the distance, I don't see any changes in orbital positions significantly affecting what I said.
According to
The World Almanac 2011, Saturn's distance from the earth varies from 743 million miles to 1,031 million miles, while Uranus' distance from the earth varies from 1,605 million to 1,962 million miles. So generally Uranus is about twice as distant, but at times it could be only 1.6 times as distant.
In astronomical units, Saturn's mean distance from the sun is 9.582 while Uranus' is 19.201.
Well, given changes in orbital positions, the distance between Saturn and Uranus could be more than twice what it was before. I'm just saying.
(giggle)