Why Comet C/2020 F3 Neowise returns even it's orbit is near- parabolic?
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).