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CONGO, model of cometary non-gravitational forces combining astrometric and production rate data
Astronomy and Astrophysics
The gravitational orbit of a comet is affected by the sublimation of water molecules by the nucleus when the comet approaches perihelion. This outgassing triggers a non-gravitational force (NGF) that significantly modifies the orbit of the comet. Up to now, modelling of this effect is mostly based on an empirical model defined in the early 70s that uses a simplified outgassing model. Attempts have been made to use advanced anisotropic thermal models both to calculate the NGF taking severaldoi:10.1051/0004-6361/201220198 fatcat:mybvngv5qzdjdgyewdiesine24