Results 21 to 30 of about 2,437 (254)

The Gateway from Centaurs to Jupiter-family Comets: Thermal and Dynamical Evolution

open access: yesThe Astrophysical Journal, 2023
It was recently proposed that there exists a “gateway” in the orbital parameter space through which Centaurs transition to Jupiter-family comets (JFCs).
Aurélie Guilbert-Lepoutre   +3 more
doaj   +1 more source

Comets of Short Period [PDF]

open access: yesNature, 1890
IT is now generally accepted that the periodic comets of our system did not originate in it, but are bodies captured from outer space by one of the planets, the parabolic orbits in which they approached the system being transformed into elliptical ones.
openaire   +1 more source

The transition between long period comets, short period comets and meteoroid streams [PDF]

open access: yesInternational Astronomical Union Colloquium, 1985
It has long been realised that Jovian perturbation is the dominant cause of the transition of long period comets (Period > 200 yr) into short period ones (P < 200 yr). When the differences in the detectability of comets in the two groups are taken into account it is clear that the present day flux of long period comets is sufficient to provide ...
openaire   +1 more source

Stochastic capture of short-period comets [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1989
Un modele d'orbite de comete a courte periode, incluant les perturbations dues aux planetes, est developpe. La capture de ces cometes est analysee en faisant varier l'inclinaison et le perihelie.
C. R. Stagg, M. E. Bailey
openaire   +1 more source

Comprehensive Study of the Chemical Composition and Spatial Outgassing Behavior of Hyperactive Comet 46P/Wirtanen Using Near-IR Spectroscopy during its Historic 2018 Apparition

open access: yesThe Astronomical Journal, 2023
We present a comprehensive analysis of the chemical composition of the Jupiter-family comet and potential spacecraft target 46P/Wirtanen, in the near-IR wavelength range.
Younas Khan   +13 more
doaj   +1 more source

The distant activity of Short Period Comets- II. [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2007
A surprisingly large number of short-period comets have been observed with significant activity (a coma and even a well-developed dust tail) at heliocentric distances greater than 3 au, where the water sublimation rate is low and thus the sublimation of other volatiles, such as for example CO, could drive the presence of a coma.
E. Mazzotta Epifani   +5 more
openaire   +2 more sources

Comparing the reflectivity of ungrouped carbonaceous chondrites with those of short-period comets like 2P/Encke

open access: yes, 2020
Aims. The existence of asteroid complexes produced by the disruption of these comets suggests that evolved comets could also produce high-strength materials able to survive as meteorites.
Llorca Piqué, Jordi
core   +2 more sources

CLATHRATE HYDRATES FORMATION IN SHORT-PERIOD COMETS

open access: yesThe Astrophysical Journal, 2009
The initial composition of current models of cometary nuclei is only based on two forms of ice: crystalline ice for long-period comets and amorphous ice for short-period comets. A third form of ice, i.e., clathrate hydrate, could exist within the short-period cometary nuclei, but the area of formation of this crystalline structure in these objects has ...
Marboeuf, Ulysse   +3 more
openaire   +4 more sources

Cylindrical Manifolds and Tube Dynamics in the Restricted Three-Body Problem [PDF]

open access: yes, 2004
Within the phase space of the planar circular restricted three-body problem, stable and unstable manifolds of periodic orbits with a S x R (cylindrical) geometry are shown to exist.
Ross, Shane David
core   +1 more source

Pits on Jupiter-family Comets and the Age of Cometary Surfaces

open access: yesThe Planetary Science Journal, 2023
Large and deep depressions, also known as pits, are observed at the surface of all Jupiter-family comets (JFCs) imaged by spacecraft missions. They offer the opportunity to glimpse the subsurface characteristics of comet nuclei and study the complex ...
Aurélie Guilbert-Lepoutre   +6 more
doaj   +1 more source

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