[ryanblakeley]

There were a number of anomalous characteristics including its shape, acceleration, rotation, origin, and reflectivity.

[ceejayoz]

How do we know they're anomalous characteristics if it's literally the first one we've ever spotted? What is the normal shape of an interstellar comet core?

[cubefox]

For example, being flat like a pancake is obviously highly unusual and very different from anything we have seen from stellar comets.

[TheBlight]

The same as the ones from this system. Borisov had the same characteristics.