Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87..911b&link_type=abstract
Astronomical Journal, vol. 87, June 1982, p. 911-917.
Astronomy and Astrophysics
Astronomy
16
Comets, Orbital Elements, Axes (Reference Lines), Ellipsoids, Perihelions, Statistical Distributions, Comets, Long-Period Comets, Distribution, Orbits, Perihelia, Diagrams, Data, Oort Cloud, Origin, Statistical Analysis, Procedure, Techniques, Mathematical Models
Scientific paper
The distribution of the axes defining the planes and orientations of the orbits of 542 long-period comets are analyzed. The directions of the perihelia and of the oriented plane normals show significant nonuniformity in their distributions. The preferred direction of perihelia near the apex of solar motion is refined to an (1 sigma) error circle of 20.6 deg, and possible concentrations of the plane normals and the directions of perihelion velocity along roughly orthogonal directions are noted, although the error circles extend to nearly full hemispheres. Planes of preference (and avoidance) are found from the distribution ellipsoids of the three orbital axes, with the perihelion directions lying preferentially along the galactic plane. The distribution ellipsoids of all three sets of orbital axes exhibit anisotropies roughly twice those expected for random distributions.
Bogart Richard. S.
Noerdlinger Peter D.
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