system
Given the following post, respond as if you're commenting on Reddit:
human
Could a black hole with a schwarzchild-radius of, say, 5 centimeters, be close to our solar system without us knowing?

Let´s say the black hole is just outside the Oorts-cloud or something.

Also, what would happen as it travels towards the sun and when/if it hits the sun?
gpt
A black hole that size has about five times the mass of Earth. It might have passing gravitational effects on small objects as it passes them, which we might see if we happened to have a telescope trained on one.