International Rosetta Mission: The Asteroid Flybys

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

The International Rosetta Mission is the third cornerstone in ESA's long-term programme Horizons 2000. The spacecraft will be launched on 13 January 2003 from Kourou for its long journey to a rendezvous with comet 46P/ Wirtanen. A gravity assist at Mars and two Earth gravity-assist manoeuvres will provide the orbital energy for the spacecraft to rendezvous with the comet in 2011. On its way to the comet the spacecraft will pass close to two asteroids, Otawara in July 2006 and Siwa in July 2008 providing two excellent asteroid science opportunities.The relative velocities will be 10.63 km/s and 17.04 km/s, respectively. We will describe in detail the flyby geometries and the mission sequences. Based on simulations with our new science operations planning tool we present different trade-offs to optimise the science return from the Rosetta orbiter payload complement.

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