Planetology Group Modelling and ground observations. Presentation to the Visiting Committee 26 November 2007. Valsecchi, Coradini and Carusi in Tucson, 1981, “Comets” meeting. The Planetology Group.
Planetology GroupModelling and ground observations
Presentation to the Visiting Committee
26 November 2007
Valsecchi, Coradini and Carusi in Tucson, 1981, “Comets” meeting.
The Planetology Group
space exploration and instrumentation, and are now involved, at the PI level, in all major Solar System space missions
Theoretical modelling: 1) Origin
Theoretical modelling: 1) Origin (cont.ed)
The group has developed several 3D hydrodynamical and N-body codes that follow the accretion of GPs and the dynamical evolution of a swarm of solid bodies under the action of the Sun, the viscous drag of the gas of the Solar Nebula and the presence of a number (one to four) of GPs.
Density distribution of gas around Jupiter and Saturn in the final phases of their accretion (5 103 yr for Jupiter and 104 yr for Saturn)
Theoretical modelling: 2) Dynamics
Comparison of analytical and numerical identification of keyholes on the b-plane of 2029 encounter of (99942) Apophis with the Earth
Theoretical modelling: 3) Comet interiors
Theoretical modelling: 3) Comet interiors (cont.ed)
Application of the model to comet Tempel 1 (Deep Impact target): Thermal map of the surface @1.5 AU
Deep-Impact thermal map
Theoretical modelling: 4) NEOs
Theoretical modelling: 4) NEOs (cont.ed)
Investigation of the possible deflection of 99942 Apophis using kinetic energy. The plot shows the Delta V necessary to be delivered to the NEO in order to avoid the impact in 2036.
Ground observations: 1) Comets
Three spectra of 9P/Tempel 1 close to the Deep Impact event. The line of oxygen is very well visible in all 3 spectra.
Ground observations: 2) NEOs
Comet 167P/CINEOS, discovered at Campo Imperatore, is the short period comet with the largest perihelion distance.
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