Named in honor of Chen-wan L. Yen, a senior analyst within the Mission and Systems Architecture Section of NASA’ Jet Propulsion Laboratory. Chen-wan has done seminal work in the development and application of optimization techniques to interplanetary trajectories. Using multiple-impulse and gravity-assist techniques, her optimized interplanetary trajectories have allowed significant payloads to be launched within current launch vehicle capabilities. Her work is evident in the interplanetary trajectories designed for the Galileo mission to Jupiter, the Magellan mission to Venus, the Cassini mission to Saturn, and the Stardust mission to return a dust sample from comet 81P/Wild 2. (M 34351) _ _.