The following is a list of
comets with a very high
eccentricity (generally 0.99 or higher) and a
period of over 1,000 years that do not quite have a high enough
velocity to escape the
Solar System. Often, these comets, due to their extreme
semimajor axes
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the two most widely separated points of the perimeter. The semi-major axis (major semiaxis) is the longe ...
and eccentricity, will have small orbital interactions with
planets and
minor planets, most often ending up with the comets fluctuating significantly in their
orbital path. These comets probably come from the
Oort cloud, a cloud of comets orbiting the
Sun from ~10,000 to roughly 50,000
AU. The actual orbit of these comets significantly differs from the provided coordinates. A Solar System
barycentric orbit computed at an
epoch when the object is located beyond all the planets is a more accurate measurement of its long-term orbit.
List of near-parabolic comets
See also
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List of comets by type
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List of Halley-type comets
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List of hyperbolic comets
This is a list of parabolic and hyperbolic comets in the Solar System. Many of these comets may come from the Oort cloud, or perhaps even have interstellar origin. The Oort Cloud is not gravitationally attracted enough to the Sun to form into a ...
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List of long-period comets
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. For comet ...
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List of numbered comets
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List of periodic comets
Periodic comets (also known as short-period comets) are comets with orbital periods of less than 200 years or that have been observed during more than a single perihelion passage (e.g. 153P/Ikeya–Zhang). "Periodic comet" is also sometimes used ...
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near parabolic