Dawn by NASA
= Dawn by NASA
{c}
https://science.nasa.gov/mission/dawn/
Mission description and launch date. Instrument-team description: https://science.nasa.gov/mission/dawn/technology/science-payload/ . Ion propulsion: https://science.nasa.gov/mission/dawn/technology/ion-propulsion/ . Relevant locators: Vesta and Ceres targets; framing camera, visible/infrared spectrometer, gamma ray and neutron detector; gravity inferred by radio tracking.