At the other end of the Sol system...
On a related note, it is said that the magnitude of Uranus averages 6.0, just at the limits of human seeing. Has anyone ever tried to see Uranus with unaided vision, and if so, what happened?
I remember the night I saw M31 from the dark of my grandmother's rural home. At nearly 3 million light years from Earth, I was impressed, even though it was just a faint fuzz.