Results 241 to 250 of about 2,956 (261)

The Shortage of Long-Period Comets in Elliptical Orbits

Symposium - International Astronomical Union, 1979
Based on the number of ‘new’ comets seen on near-parabolic orbits, one can predict the number of comets that should be found on definitely elliptical orbits on their subsequent returns. We show here that about three out of four of these returning comets are not observed.
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Distribution of long-period comets in perihelion distance

International Astronomical Union Colloquium, 1999
AbstractDistribution of long-period comets in perihelion distance is investigated. The relationN( > q)=C qαseems to be a good approximation to the reality −N(>q)is the number of long-period comets with perihelion distance greater than the valueq( in AU). The complete group of long-period comets is characterized by the valueα =4/3, however,
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Planetary impact probabilities for long-period comets

Icarus, 1984
Abstract Planetary impact probabilities for long-period (near-parabolic) comets are determined by averaging Opik's equations over inclination and perihelion distance for each planet. These averaged values compare well with the results of more elaborate Monte Carlo calculations. The impact probabilities are proportional to the square of the normalized
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The activity pattern of distant long period comets

Modern sky surveys now regularly discover comets at distances between 5 and 10 au, or even further, from the Sun. This is expected to become more common when the Vera C Rubin observatory’s Legacy Survey of Space and Time (LSST) begins in around a year. Yet the distant activity of comets is still poorly understood – at such distances
Colin Snodgrass, Carrie Holt
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Heliocentric Light Curves of Long-Period Comets

We investigate the heliocentric brightening behavior of long-period comets as a function of their dynamical age, parameterized by the original reciprocal semimajor axis, 1/a0. The analysis is designed to test longstanding assertions regarding cometary photometric evolution using a substantial dataset of magnitude measurements reported to the Minor ...
Pedro Lacerda, Aurélie Guilbert-Lepoutre, Rosita Kokotanekova, Laura Inno, Elena Mazzotta Epifani, Colin Snodgrass, Nicolas Biver   +6 more
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The Kozai resonance in the outer solar system and the dynamics of long-period comets

Celestial Mechanics and Dynamical Astronomy, 1996
Alessandro Morbidelli, Morbidelli Alessandro   +1 more
exaly  

COMETS OF LONG PERIOD

2010
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Discovery statistics and 1/a distribution of long-period comets detected during 1801–2017

Monthly Notices of the Royal Astronomical Society, 2019
Małgorzata Królikowska, Piotr A Dybczyński   +1 more
exaly  

Capture of interstellar objects: a source of long-period comets

Monthly Notices of the Royal Astronomical Society: Letters, 2020
Walter Dehnen, Dehnen W
exaly  

Long-period comets

2006
openaire   +1 more source