Hacker News Reader

The problem is that the star positions change over time via galactic orbit. 'Oumuamua's trajectory appears to originate from Vega, but Vega would have been at a different position in relation to our solar system back when 'Oumuamua was at the same distance from the Sun as Vega.

Not only is the system in question dynamic, as another pointed out, but also subject to perturbations. Worse, orbital mechanics with many bodies is chaotic, in the strict sense.

I don't think so... it slungshot around the sun, which implies that its in a very large sun oriented orbit. (eg: some random object passing bit for the first time would be likely only slightly disturbed by the suns gravity, not coming so close to it... the latter seems to imply it has been caught by the suns gravity.... or just happened to be aimed nearly directly at the sun.)

No, they distinctly say it is hyperbolic, not an ellipse, so not orbiting the sun