When you said visible with the naked eye did you mean though the scope or just looking up at the sky. If you meant through the scope (not usually what neked eye means but I think this might be what you meant) than it could be pluto. If you meant just looking at the sky then it ain't pluto
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EDIT:When I look at your photo I feel that what you have labeled as pluto is too bright. It would look more like very faint star right in the middle. Hope you manage to get it though
