Canonical Elements for Öpik Theory

Details Canonical Elements for Öpik Theory Canonical Elements for Öpik Theory

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cemda..94..173t&link_type=abstract

Celestial Mechanics and Dynamical Astronomy, Volume 94, Issue 2, pp.173-195

Astronomy and Astrophysics

Astronomy

2

Canonical Elements, Hyperbolic Collision Orbits, &Ouml, Pik Theory

Scientific paper

The purpose of this paper is to find a set of canonical elements to use within the framework of Öpik theory of close encounters of a small body with a planet (Öpik, Interplanetary Encounters, 1976). Since the small body travels along a planetocentric hyperbola during the close approach and Öpik formulas are valid, without approximations, only at collision, we derive a set of canonical elements for hyperbolic collision orbits (eccentricity e → 1+, semi-major axis a fixed) and then we introduce the unperturbed velocity of the small body and the distance covered along the asymptote as a new canonically conjugate pair of orbital elements. An interesting result would be to get a canonical set containing the coordinates in the Target Plane (TP), useful for the analysis of the future encounters: in the last part we prove that this is not possible.

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