[illuminant]

Without changing the periodicity of the orbital ecliptic? I am skeptical.

We have calendars from ancient civilization which show the periodicity of visible planets, and they have been stable for over a thousand years.

[ahazred8ta]

Primordial black holes are expected to be the mass of a small asteroid, and traveling at several hundred km per second. You would not be able to measure the gravitational effect of something like that passing through the solar system, even if it came within a hundred meters of your space station.