Neptune is pretty tough, i've only ever seen it 3 times, twice in a 12" dob and once in a 6" refractor. It's definantly distinguishable to a star. To me, it's a deep blue clolour.
Pluto is really close to the core of the milky way and is pretty darn faint. It will be "lost" in a sea of other stars that are similar in appearance to it from here.
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