Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..262y&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, Jan. 1989, p. 262-264.
Astronomy and Astrophysics
Astronomy
17
Comets, Gravitational Effects, Orbital Elements, Oort Cloud, Orbit Perturbation, Perihelions, Tides, Comets, Orbital Elements, Perturbations, Orbits, Tidal Effects, Astronomy, Long-Period Comets, Catalog, Calculations
Scientific paper
Cometary orbits are perturbed by the galactic tidal field as well as by stellar and giant molecular interactions. Of long-period comets observed until 1982, 48 comets have original semimajor axes a between l.0 × 104 and 4.0 × 104 AU. On the premises that the original semimajor axes are accurate and that stellar and GMC perturbations can be neglected, orbital elements of the 48 comets at the previous approaches to the Sun are calculated. It is found that the perturbation of perihelion distance q is approximately given by the formula δq is asymptotically equal to 12.4 × (25 000 AU/αoriginal)-6.3±0.2 AU.
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