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)

• It is a long-periodic comet. "Non-periodic" means that the comet wouldn't return for ten thousands of years and that we can't determine precisely when it would return. So the Wikipedia section is wrong. – Ioannes Jul 18 at 8:32
• Isn't non-periodic means we can't predict when it comes back? Also the reference in Wikipedia page is NASA JPL website. It says about period of comet. JPL Horizons barycentric solution for epoch 1950 (before entering planetary region) Goto JPL Horizons Ephemeris Type: Orbital Elements Center: @0 (Solar System Barycenter) Time Span: 1950-01-01 to 2050-01-01 and Step Size: 100 years 1950-Jan-01 is "PR = 1.63 × 106/365.25 days" = 4462 years (For long-period comets on multi-thousand year orbits, asymmetric outgassing will affect the highly sensitive orbital period and eccentricity.) – Athul R T Jul 18 at 8:44
• Link to the reference : ssd.jpl.nasa.gov/… – Athul R T Jul 18 at 8:45

"Near-parabolic" means almost or nearly parabolic, but not quite. Another term would be "highly elliptical". Technically speaking, no realistic orbit can really be exactly parabolic since that means eccentricity is exactly 1.00000000000.... and most of Physics (solar photon pressure, relativity, gravitational perturbations from other bodies, etc.) doesn't happen.