Why Comet C/2020 F3 Neowise returns even it's orbit is near- parabolic? I have read in Wikipedia about  Comet C/2020 F3 Neowise that it's orbit is near-parabolic. But in another section, it says that it is a non-periodic comet whlith orbital period ranging from 4500 years to 6800 years.
My doubt is how a comet returns back if it is in a parabolic orbit and why it is non-periodic?
Here is the Wikipedia link: https://en.m.wikipedia.org/wiki/C/2020_F3_(NEOWISE)
Comet naming conventions limit &quot;periodic comets&quot; to those comets whose orbital period is less than 200 years. Comets in elliptical orbits with a period of greater than 200 years are classified as non-periodic. Comets in parabolic or hyperbolic trajectories are also classified as non-periodic (and they will never again approach the primary).