Cometary dynamics

Details Cometary dynamics Cometary dynamics

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept..138y&link_type=abstract

In NASA, Washington Reports of Planetary Astronomy, 1985 p 138 (SEE N87-12407 03-89)

Astronomy and Astrophysics

Astronomy

Astrometry, Cometary Atmospheres, Planet Ephemerides, Stellar Orbits, Asteroids, Comet Nuclei, Ice, Planetary Gravitation

Scientific paper

In order to provide observers with accurate cometary ephemerides, up-to-date astrometric positions must be used to update the existing orbit and ephemeris for each object. In addition, nongravitational forces must be taken into account; these forces are assumed due to the rocket effect of outgassing cometary ices. Once successfully modeled, the cometary nucleus spin direction, spin axis evolution, and the volatility of the nucleus ices can be inferred. The predicted ephemerides also become far more accurate.

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