On the observed excess of retrograde orbits among long-period comets

Details On the observed excess of retrograde orbits among long-period comets On the observed excess of retrograde orbits among long-period comets

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.197..265f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 197, Oct. 1981, p. 265-273.

Astronomy and Astrophysics

Astronomy

7

Celestial Mechanics, Comets, Orbital Elements, Solar Orbits, Orbit Calculation, Perturbation Theory, Planetary Evolution

Scientific paper

Analysis of the i-distribution of the observed long-period comets points to an excess of retrograde orbits which increases with the perihelion distance. The same behavior is found for the new and very young long-period comets (with semi-major axes greater than 1000 AU). Therefore it is suggested that such excess is not caused by the dynamical aging of the comet population, but is already present in the incoming new comets. It is also shown that a significant fraction of the so-called new comets are actually repeating passages through the planetary region.

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