[foolish-one]

Speculation?

[petuniasevan]

There's a lot of guesswork contained in the announcement, yes. No doubt though about there being an object. As for the orbit, I don't see how 4 months of watching it will render enough hard data to trace a reasonably accurate orbit.

Temperature is another matter. Notice that the Spitzer Space Telescope cannot detect its infrared (heat) signature because of its combination of extreme cold and small size.