Oh no! Another alien probe

[Anomalocaris]

That that makes it impossible for such an object to form elsewhere?

No.  It's just unusual given the immense volume of space for there to be interstellar interlopers.  Clearly, much more scientific study is needed.

It may actually not be that uncommon.  Some estimate suggest several interstellar object with diameter on the order of sevrral meter passes through the solar system inside the orbit of the earth every year.

It's just that objects that small traveling in hypobolic orbits are difficult to detect even if they come through the inner solar system, and resources have not been devoted to systematically searching for them.

There have been visual meteors which streaked through the earth's atmosphere at apparent speeds suggestive of hyperbolic velocity and extra-solar origin. But photographic proof establishing definitively their atmospheric entry speed is lacking, which is required to prove their original orbital essentricity.

This object is much larger, and can be detected much further away than an one meter object.  It happen to reach detection threshold while we have instruments pointed in its direction.  The operator happen to be interested in finding comets and asteroids,  this object so happen to sufficiently resemble a small comet or asteroid for the operator to take a second and then a third look. if it weren't for these coincidences, it would have gone zooming off without us being any the wiser.    Had it not been found within a few month of when we actually found it, even Hubble pointed in exactly the right direction would not have seen it.