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- Interstellar_comet abstract "An interstellar comet is a comet (or exocomet) located in interstellar space, and not gravitationally bound to a star. Besides known comets within the Solar System, or known extrasolar comets, no interstellar comet, not gravitationally bound to a star, has been conclusively identified. Nonetheless, such comets are conjectured to exist: gravitational scattering by planets and passing stars has ejected many Oort cloud comets from the Solar System, and the likelihood of similar processes in extrasolar planetary systems suggests the existence of a large population of unbound cometary bodies. At present, an interstellar comet can only be detected if it passes through the Solar System, and could be distinguished from an Oort cloud comet by its strongly hyperbolic trajectory (indicating that it is not gravitationally bound to the Sun). Comets with weakly hyperbolic trajectories have been observed, but the trajectories of these comets are consistent with having been knocked loose from the Oort cloud and do not indicate an origin in interstellar space. The most eccentric known comet, C/1980 E1, only has an eccentricity of 1.057, far less eccentric than an interstellar comet would be expected to be.Current models of Oort cloud formation indicate that more comets are ejected into interstellar space than are retained in the Oort cloud, by a factor of 3–100. Other simulations suggest 90–99% of comets are ejected. There is no reason to believe comets formed in other star systems would not be similarly scattered. If interstellar comets exist, they must occasionally pass through the inner Solar System. They would approach the Solar System with random velocities, mostly from the region of the constellation Hercules because the Solar System is moving in that direction. The fact that no comet with a speed greater than the Sun's escape velocity has yet been seen places upper limits to their density in interstellar space. A paper by Torbett indicates that the density is no more than 1013 (10 trillion) comets per cubic parsec. Other analyses, of data from LINEAR, set the upper limit at 4.5×10−4/AU3, or 1012 (1 trillion) comets per cubic parsec.An interstellar comet could, on rare occasions, be captured into a heliocentric orbit while passing through the Solar System. Computer simulations show that Jupiter is the only planet massive enough to capture one, and that this can be expected to occur once every sixty million years. Comets Machholz 1 and Hyakutake C/1996 B2 are possible examples of such comets. They have atypical chemical makeups for comets in the Solar System.".
- Interstellar_comet thumbnail Hyakutake_Color.jpg?width=300.
- Interstellar_comet wikiPageID "21694580".
- Interstellar_comet wikiPageLength "7352".
- Interstellar_comet wikiPageOutDegree "31".
- Interstellar_comet wikiPageRevisionID "690492482".
- Interstellar_comet wikiPageWikiLink Machholz.
- Interstellar_comet wikiPageWikiLink Astronomical_unit.
- Interstellar_comet wikiPageWikiLink 1980_E1.
- Interstellar_comet wikiPageWikiLink Category:Comets.
- Interstellar_comet wikiPageWikiLink Category:Exoplanetology.
- Interstellar_comet wikiPageWikiLink Category:Hypothetical_astronomical_objects.
- Interstellar_comet wikiPageWikiLink Comet.
- Interstellar_comet wikiPageWikiLink Comet_Hyakutake.
- Interstellar_comet wikiPageWikiLink Exocomet.
- Interstellar_comet wikiPageWikiLink Gravitational_binding_energy.
- Interstellar_comet wikiPageWikiLink Heliocentrism.
- Interstellar_comet wikiPageWikiLink Hercules_(constellation).
- Interstellar_comet wikiPageWikiLink Jupiter.
- Interstellar_comet wikiPageWikiLink Lincoln_Near-Earth_Asteroid_Research.
- Interstellar_comet wikiPageWikiLink List_of_Solar_System_objects_by_greatest_aphelion.
- Interstellar_comet wikiPageWikiLink Oort_cloud.
- Interstellar_comet wikiPageWikiLink Orders_of_magnitude_(numbers).
- Interstellar_comet wikiPageWikiLink Outer_space.
- Interstellar_comet wikiPageWikiLink Parsec.
- Interstellar_comet wikiPageWikiLink Rogue_planet.
- Interstellar_comet wikiPageWikiLink Solar_System.
- Interstellar_comet wikiPageWikiLink Star.
- Interstellar_comet wikiPageWikiLink Sun.
- Interstellar_comet wikiPageWikiLink File:96P_20070403_000500_HI1A.png.
- Interstellar_comet wikiPageWikiLink File:Hyakutake_Color.jpg.
- Interstellar_comet wikiPageWikiLinkText "Interstellar comet".
- Interstellar_comet wikiPageWikiLinkText "interstellar comet".
- Interstellar_comet wikiPageWikiLinkText "interstellar objects".
- Interstellar_comet wikiPageWikiLinkText "interstellar".
- Interstellar_comet wikiPageUsesTemplate Template:Comets.
- Interstellar_comet wikiPageUsesTemplate Template:Commons_category.
- Interstellar_comet wikiPageUsesTemplate Template:E.
- Interstellar_comet wikiPageUsesTemplate Template:Exoplanet.
- Interstellar_comet wikiPageUsesTemplate Template:Reflist.
- Interstellar_comet wikiPageUsesTemplate Template:Wiktionary.
- Interstellar_comet subject Category:Comets.
- Interstellar_comet subject Category:Exoplanetology.
- Interstellar_comet subject Category:Hypothetical_astronomical_objects.
- Interstellar_comet hypernym Comet.
- Interstellar_comet type Planet.
- Interstellar_comet type Object.
- Interstellar_comet comment "An interstellar comet is a comet (or exocomet) located in interstellar space, and not gravitationally bound to a star. Besides known comets within the Solar System, or known extrasolar comets, no interstellar comet, not gravitationally bound to a star, has been conclusively identified.".
- Interstellar_comet label "Interstellar comet".
- Interstellar_comet sameAs Q2441216.
- Interstellar_comet sameAs Міжзоркавая_камета.
- Interstellar_comet sameAs Διαστρικός_κομήτης.
- Interstellar_comet sameAs Cometa_interestelar.
- Interstellar_comet sameAs Comète_interstellaire.
- Interstellar_comet sameAs Cometa_interstellare.
- Interstellar_comet sameAs m.05mtthx.
- Interstellar_comet sameAs Межзвёздная_комета.
- Interstellar_comet sameAs Medzvezdni_komet.
- Interstellar_comet sameAs Interstellär_komet.
- Interstellar_comet sameAs Yıldızlararası_kuyruklu_yıldız.
- Interstellar_comet sameAs Міжзоряна_комета.
- Interstellar_comet sameAs Q2441216.
- Interstellar_comet sameAs 星際彗星.
- Interstellar_comet wasDerivedFrom Interstellar_comet?oldid=690492482.
- Interstellar_comet depiction Hyakutake_Color.jpg.
- Interstellar_comet isPrimaryTopicOf Interstellar_comet.