Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991plas.rept..139y&link_type=abstract
In NASA, Washington, Reports of Planetary Astronomy, 1991 p 139-140 (SEE N92-12792 03-89)
Astronomy and Astrophysics
Astronomy
Asteroids, Astronomical Models, Comets, Dynamic Models, Ephemerides, Orbit Calculation, Gravitational Fields, Ice, Nasa Programs, Outgassing, Thrust
Scientific paper
In order to provide the ground-based observing community and NASA flight projects with accurate comet and asteroids ephemerides, improvements are being made to the existing dynamic models and new data type are being investigated. For active comets, non-gravitational forces must be taken into account; these forces are assumed due to the rocket-like thrusting of outgassing cometary ices.
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