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Dynamics of Dust Particles of Different Structure: Application to the Modeling of Dust Motion in the Vicinity of the Nucleus of Comet 67P/Churyumov-Gerasimenko

Hartogh, P.; Rezac, L.; Lacerda, P. +2 more

We consider the estimates of the main forces acting on dust particles near a cometary nucleus. On the basis of these estimates, the motion of dust particles of different structure and mass is analyzed. We consider the following forces: (1) the cometary nucleus gravity, (2) the solar radiation pressure, and (3) the drag on dust particles by a flow …

Dynamics and Origin of Comets: New Problems Appeared after the Rosetta Space Mission

Emel'yanenko, V. V.

The data obtained in the recent Rosetta space mission to comet 67P/Churyumov-Gerasimenko have had a profound impact on the understanding of the nature of comets. In addition to revising the notions on the physical properties and structure of comets, this addresses dynamical aspects of the formation of the observed cometary populations (short- and …

Lineaments on the Surface of the Consolidated Material of the Comet 67P/Churyumov-Gerasimenko Nucleus

Keller, H. U.; Hviid, S. F.; Mall, U. +3 more

Morphologic analysis of the fragments (500 × 500 pixels) of images of comet 67P/Churyumov- Gerasimenko obtained with the OSIRIS camera for 18 regions, where the consolidated material is exposed on the surface, has been carried out. In terms of resolution, the images form a series from 0.04 to 1.29 m/pixel; consequently, the areas covered by these …