Non-gravitational force model vs observation: the trajectory and rotation-axis of comet 67P/Churyumov-Gerasimenko
- The determination of non-gravitational forces based on precise astrometry is one of the main tools to establish the cometary character of interstellar and solar-system objects. The Rosetta mission to comet 67P/C-G provided the unique opportunity to benchmark Earth-bound estimates of non-gravitational forces with in-situ data. We determine the accuracy of the standard Marsden and Sekanina parametrization of non-gravitational forces with respect to the observed dynamics. Additionally we analyse the rotation-axis changes (orientation and period) of 67P/C-G. This comparison provides a reference case for future cometary missions and sublimation models for non-gravitational forces.
| Author: | Tobias KramerORCiD, Matthias LäuterORCiD |
|---|---|
| Document Type: | In Proceedings |
| Parent Title (English): | Europlanet Science Congress |
| Volume: | 14 |
| First Page: | EPSC2020-403 |
| Publisher: | Europlanet Science Congress |
| Year of first publication: | 2020 |
| Published in: | Europlanet Science Congress |
| DOI: | https://doi.org/10.5194/epsc2020-403 |

