The official names of non-periodic comets begin with a "C"; the names of periodic comets begin with "P" or a number followed by "P". Comets that have been lost or disappeared have names with a "D". Comets whose orbit has not been determined are designated with a "X" prefix.

Comets are a class of small celestial objects orbiting the Sun and developing diffuse gaseous envelopes and often long luminous tails when near the Sun. The comet makes a transient appearance in the sky and is often said to have a “hairy” tail.

This is a list of comets (bodies that travel in elliptical, parabolic, and sometimes hyperbolic orbits and display a tail behind them) listed by type.

2023年1月5日 · Take a trip down memory lane to revisit the most spectacular comets of the past half-century. Comet NEOWISE gracefully arcs though twilight in December 2020. Great comets are fixtures...

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 [1] (e.g. 153P/Ikeya–Zhang). "Periodic comet" is also sometimes used to mean any comet with a periodic orbit, even if greater than 200 years.

This is a list of some comets in the solar system. Periodic comets visit us again and again. Non-periodic comets visit us only once. On this list there is a "P" in front of the periodic comets. In front of non-periodic comets there is a "C".

2018年8月1日 · Comets are intrinsically highly unpredictable objects, since their brightness depends on the scattering of sunlight from dust particles in the comet's coma and tail.

Below is a table of designations and names of comets seen from the ground (meaning that this listing omits those comets viewed only from spacecraft observing near the sun). Columns 1-15 contain the new-style designation (established in 1995); X/ comets are those without orbits, and only those prior to the 5th century AD are listed here.

This includes all numbered periodic comets (those observed on at least two apparitions) and unnumbered comets whose orbital periods have been determined to be less than 200 years. An exception to this is the sungrazing comets observed by …

The following table lists the major periodic comets in our solar system. Periodic comets, also called short-period comets, have orbital periods of less than 200 years or which have been observed during at least one perihelion passage.