[haarolean]

> you might get dangerous X-ray and gamma ray emissions from its accretion disc

There’s not enough matter nearby to feed it enough to form an accretion disc

> we could send probes to orbit it

Hitting a cm-sized black hole orbit at a lunar distance sounds insanely hard, given it’s invisible (even with occasional lensing).

[sliken]

Obviously we've managed to orbit the moon. To find the blackhole that replaced the moon just enter lunar orbit and keep firing your thrusters to slow down.