Tried looking in Cartes du Ceil and thought of making a map for you BUT you will need several at different magnifications. If you don't have a copy of CDC think about downloading it, very worth while.
FWIW Neptune is in Capricornius and should be fairly easily found but when I go looking for these distant planets I find it much better to make a quick sketch of the FOV then revisit it regularly over the next few weeks and map the movement. Otherwise you just tick that you have seen a little bright star and not a wanderer which is where tye get their name from (planet basically means wandering star I think).
I found Neptune easily last night with the ETX with the goto but I didn't have the Dob out.
