The winning trajectory was identified by a team from the Polytechnic of Turin, Italy. Two professors, Lorenzo Casalino and Guido Colasurdo, along with Ph.D. student Matteo Rosa Sentinella and graduate student Francesco Cacciatore, successfully eliminated billions of possible asteroid trips to focus on the most practical ones. Their winning proposal, involves visits to four different asteroids in over nine years.
The Global Trajectory Optimisation Competition was instituted in 2005 by Dario Izzo of the European Space Agency's Advanced Concepts Team.
Details on asteroid Ida may be found here: http://www.educnet.education.fr/svt/anim/ticeamiens501/Planetes/Asteroid/ida.htm