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  • List of long-period comets - Wikipedia
    The following list is of comets with very long orbital periods, defined as between 200 and 1000 years These comets come from the Kuiper belt and scattered disk, beyond the orbit of Pluto, with possible origins in the Oort cloud for many
  • Long-period comets | BBC Sky at Night Magazine
    A beginner's guide to what long-period comets are, where they come, famous examples and why they're so fascinating
  • Famous Comets: The Complete List - Little Astronomy
    Visibility depends on a comet’s orbit and brightness: some short-period comets return predictably but are faint, while some long-period comets become bright but unpredictable
  • Types of Comet - CometWatch
    Long period comets can have much more unpredictable orbits being randomly oriented on the celestial sphere They can return on their steps after periods of thousands to millions of years (or not at all) and so they are difficult to detect and catalogue
  • Long-period Comets | COSMOS - Swinburne
    Long-period comets tend to be the most spectacular comets we see in the night sky, with the two most recent ‘great’ comets – comet Hale-Bopp (1997) and comet Hyakutake (1996) – having predicted orbital periods of several thousand years
  • Long-period comet | astronomy | Britannica
    The short-period comets were split into two groups, the Jupiter-family comets with periods shorter than about 20 years and the Halley-type comets with periods longer than 20 years but shorter than 200 years
  • Long Period Comets - an overview | ScienceDirect Topics
    A long-period comet is defined as a comet that has an orbital period of many centuries, often receding to great distances, and whose orbits are typically almost parabolic, making their returns unpredictable
  • List of Jupiter-Family and Halley-Type Comets
    The orbital period constraint in practice simply excludes low-inclination long-period comets This is a naïve list based on Tisserand and period; no attempt has been made to exclude comets with HT-like inclinations or periods
  • List of long-period comets - Grokipedia
    Long-period comets are astronomical objects characterized by sidereal orbital periods exceeding 200 years around the Sun This classification distinguishes them from short-period comets, which complete their orbits in less time, and reflects their highly elliptical trajectories that bring them close to the inner Solar System only infrequently
  • Comet Facts - Science@NASA
    Less predictable are long-period comets, many of which arrive from a region called the Oort Cloud about 100,000 astronomical units (that is, about 100,000 times the distance between Earth and the Sun) from the Sun





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