Tesi di dottorato di ricerca
The Yarkovsky Effect, Asteroid Dynamics and Impact Monitoring
Settore scientifico disciplinare
Corso di studi
SCIENZE DI BASE "GALILEO GALILEI"
tutor Prof. Milani Comparetti, Andrea
- impact monitoring
- asteroids families
- Yarkovsky effect
- asteroid dynamics
Data inizio appello
This thesis is a collection of the work carried out during the three<br>years of Ph.D. studies at the University of Pisa with the Celestial<br>Mechanics Groups.<br><br>The main topics of this thesis range from nongravitational<br>perturbations, to asteroid orbit determination, and to the impact<br>monitoring. The nongravitational perturbations arise because outer<br>space is not empty, and they can affect not only the dynamics of Near<br>Earth Asteroids (NEAs), but also the determination of the age of<br>asteroid families. The main nongravitational perturbation is the<br>Yarkovsky effect, a subtle nongravitational phenomenon related to the<br>anisotropic thermal emission of Solar System objects. The<br>nongravitational perturbations also affect the impact probabilities of<br>NEAs, especially over long time span. For some special cases, we need<br>to model the Yarkovsky effect to compute the long term propagation to<br>the possible impacts and the intervening planetary encounters of NEAs.