[Lonesome in Massachussets]

I read somewhere that the estimates are that there are about 10 interstellar objects greater than one kilometer diameter inside the solar system on average at any time. We only detect the bigger ones, occasionally.

[PIF]

"I read somewhere that the estimates are that there are about 10 interstellar objects greater than one kilometer diameter inside the solar system on average at any time. We only detect the bigger ones, occasionally."

What you read is supposed to read: the theory is that there are 10 interstellar objects ... in order to account for the statistical probability that we could detect one such object, I3 Atlas, that is between 20kmk and 10.5km in diameter, as well as an object as small as 320meters, 1I Oumuamua.