From Philae with love
Bending Rosetta’s trajectory
This Earth swingby will boost Rosetta toward the asteroid belt where it will target 2867-Steins in September 2008.
Rosetta will make another Earth swingby in November 2009 for a final gravity assist to put it on a path for its rendezvous with Comet Churyumov-Gerasimenko, the prime mission target, which it will reach in 2014.
Trajectoire de Rosetta