Better late than never - illustrations of the mirromoon setup from the previous post are ready.

Note that the illustrations are not to scale. The fact that the reflection wins on the illustrations doesn’t refute or in any other way undermine the theoretical feasibility of this solution.

Just Mirromoon

U - you, M - spherical mirror, C - center of curvature of the mirror M, R - your reflection.

Mirromoon with an auxiliary flat mirror

U - you, M - spherical mirror, C - center of curvature of the mirror M, F - flat mirror, R₁ - your reflection in M, R₂ - reflection (virtual image) of R₁ in F, R₃ - reflection (real image) of R₂ in M.

Useful links

The Wikipedia article about curved mirrors contains good illustrations of image forming in concave mirrors.