@spaceflightpedia.comDawn's ion engines changed its speed by 11.5 km/s (25,700 mph), 2.7 times the previous record for a solar-electric ion drive. Launched in 2007, NASA's Dawn became the first spacecraft to orbit two extraterrestrial bodies: Vesta (2011-2012) and Ceres (2015).
@spaceflightpedia.comJust 82 kg of xenon powered ESA's SMART-1 to the Moon. It spiralled outward for about 13 months before entering lunar orbit on 15 November 2004. Its ion thruster reached a specific impulse of 1,640 seconds, more than three times the maximum for chemical rockets.
