Kiel 2004 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 9: Poster-2

EP 9.9: Poster

Dienstag, 9. März 2004, 17:45–19:30, Foyer

Impact on a comet surface: Rosetta Lander simulations — •Martin Hilchenbach and Helmut Rosenbauer — Max-Planck-Institut fuer Aeronomie, Katlenburg-Lindau

At the end of the year 2014 the Rosetta Lander will be ejected from the Rosetta orbiter and, after a descent time of up to 1 hour, touch the surface of 67P/Churyumov-Gerasimenko, the new Rosetta mission target. The objective of the simulations of the landing on a comet is the analysis and understanding of the dynamics of the Rosetta Lander on impact on the comet surface. The Lander properties are known prior to launch. The data on the comet surface are far less familiar and must be described within an envelope covering a range of possible physical surface parameters. The kinetic energy of the Lander is damped on impact and the Lander must be secured on the comet surface. The 3-D simulations are carried out in the frame of a multibody analysis and the positions, velocities and applied and contrain forces are analysed. The new target comet 67P/Churyumov-Gerasimenko is significantly larger than the former target, 46P/Wirtanen, shifting the impact velocities to more than twice the prior envisaged values.