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Could the movement of a PBH found in the outer solar system by microlensing be totally unpredictable and impossible to track after it was first detected?

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  • $\begingroup$ I think (but don't know) that a microlensing event gives no information about direction of motion. If the only way to detect PBHs is by microlensing then it depends on the probability of a second event (and a third "in-a-row" to be confident it is the same PBH). This might be Answerable by someone who knows the probabilities. $\endgroup$ – Keith McClary Jan 8 at 5:09
  • $\begingroup$ The PBH in our outer system is the object which is thought to be possibly another planet. If it turns out that it's actually a PBH it would have the path which is postulated for the planet. When looked from above (onto the North poles), it should have an anti-clockwise orbit around our Sun. $\endgroup$ – user30007 Feb 12 at 15:33

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