Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cemda..59...73d&link_type=abstract
Celestial Mechanics and Dynamical Astronomy, vol. 59, no. 1, p. 73-89
Astronomy and Astrophysics
Astronomy
Equations Of Motion, Orbit Calculation, Planetary Orbits, Planetocentric Coordinates, Asteroids, Comets, Eccentricity, Solar Position, Time Measurement
Scientific paper
The classical problem of Keplerian orbit determination from only three measurements of time and angular coordinates(ti, alphai, deltai) has been solved here numerically in two different ways, using Newton's method for non-linear equations in both cases. The first method (Perov, 1989) is based on KS variables, whereas the second emphasizes the fundamental part played by the unified Lambert's equation and the related formulae in that kind of applications. These two methods have been compared and put into practice in various numerical tests based on real asteroid orbits and fictitious Keplerian asteroid, comet and artificial satellite orbits in order to try the stability of these methods for peculiar orbits.
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