Is there a Black Hole in our Solar System?

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This market closes when scientific consensus has reached near certainty on this issue, either by finding a black hole, or by exploring the solar system enough that it's considered essentially impossible. Close date on this market will be extended indefinitely.

Note that potential man-made black holes, such as those some have proposed could occur in particle colliders, do not count. This question refers to black holes as might be found by astronomers.

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Trans-Neptunian orbits asymmetry, over-abundance of microlensing events, and promising explanation for dark matter origins -> likely there is a small primordial black hole in the solar system of a non-stellar origin

https://www.youtube.com/watch?v=wh75ubECL8I

do man-made microscopic black holes count? e.g.

@bashmaester No

That's how the Interstellar movie began

is there a sweet spot between the mass low enough to make the hawking radiation obvious and a mass high enough to make the gravitational influence or accretion disk radiation obvious?

@JonathanRay yes, but there's no known mechanism for producing black holes of that size except perhaps primordial black holes. A 1000-ton black hole would have a lifetime close to the age of the universe. So that's a lower bound. Anything over 10^17kg would probably be detected.