[Steely Tom]

That's some far-away pixels.

For extra credit, calculate the diameter of the mirror needed on an Earth-based telescope in order to generate that level of resolution.

[z3n]

Can we cheat and use an array?

[Moonman62]

Actually we got a pretty good image of Ultima's shadow in 2017 when it eclipsed a star using an array of telescopes many miles apart.