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Comet Arend or 50P/Arend is a periodic comet in the Solar System which was discovered on October 4, 1951. [1] It was discovered by astronomer Sylvain Julien Victor Arend [1] at the Royal Observatory of Belgium located in the municipality of Uccle. The comet was illustrated at approximately a magnitude of 14 and also exhibited a nucleus within a ...
Periodic comets usually have elongated elliptical orbits, and usually return to the vicinity of the Sun after a number of decades. 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 ...
At the shorter orbital period extreme, Encke's Comet has an orbit that does not reach the orbit of Jupiter, and is known as an Encke-type comet. Short-period comets with orbital periods less than 20 years and low inclinations (up to 30 degrees) to the ecliptic are called traditional Jupiter-family comets (JFCs).
The comet wasn't recovered and became lost. In 2024 it was noted that Mars-crossing asteroid 2007 HE 4, which was discovered by LINEAR on 17 April 2007 with an apparent magnitude of 18.7–19.5, had a comet-like orbit. Maik Meyer found that the asteroid's orbit was a good match with the proposed orbit of comet Denning. [3]
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.
In 1995, comet 73P/Schwassmann–Wachmann, broke up into several pieces and as of its last perihelion date, the pieces numbered at least 67 with 73P/Schwassmann–Wachmann C as the presumed original nucleus. Because of the enormous number, the pieces of it have been compiled into a separate list.
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. Comets are sorted into four categories: periodic comets (e.g. Halley's Comet), non-periodic comets (e.g. Comet Hale–Bopp), comets with no meaningful orbit (the Great Comet of 1106), and lost comets (), displayed as either P (periodic), C (non ...
The estimated probability of Hale–Bopp's striking Earth in future passages through the inner Solar System is remote, about 2.5×10 −9 per orbit. [41] However, given that the comet nucleus is around 60 km in diameter, [9] the consequences of such an impact would be apocalyptic.