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Comet nuclei: Morphology and implied processes of surface modification
Keller, H. U.; Basilevsky, A. T.
Surface morphology and related issues for nuclei of three comets: Halley, Borrelly and Wild 2, are considered in the paper. Joint consideration of publications and results of our analysis of the comets' images led to conclusions, partly new, partly repeating conclusions published by other researchers. It was found that typical for all three nuclei…
Comet 67P/Churyumov Gerasimenko: Modeling of orientation and structure
Kossacki, Konrad J.; Szutowicz, Sławomira
The comet 67P/Churyumov-Gerasimenko is the current target of the mission Rosetta, initially planned to investigate comet 46P/Wirtanen. These two comets have similar orbits, except the distance to the Sun at perihelion, but different orbital histories and different masses. Thus, structures of the nuclei can be significantly different. The evolution…
Chaotic gravitational zones around a regularly shaped complex rotating body
Mysen, E.; Aksnes, K.; Olsen, Ø.
In preparation for the Rosetta mission, the location and widths of gravitational resonances surrounding a regularly shaped and possibly complex rotating body are mapped following the second fundamental model of resonance. It is found that for uniaxial rotation of the central body, the surrounding resonances are widest for prograde orbits. If the f…