ETD system

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Tesi etd-07162015-180136


Thesis type
Tesi di dottorato di ricerca
Author
SPOTO, FEDERICA
URN
etd-07162015-180136
Title
The Yarkovsky Effect, Asteroid Dynamics and Impact Monitoring
Settore scientifico disciplinare
MAT/07
Corso di studi
SCIENZE DI BASE "GALILEO GALILEI"
Commissione
tutor Prof. Milani Comparetti, Andrea
Parole chiave
  • asteroids
  • impact monitoring
  • asteroids families
  • Yarkovsky effect
  • asteroid dynamics
Data inizio appello
18/08/2015;
Consultabilità
completa
Riassunto analitico
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.
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