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  • 2 - Exploring Vesta and Ceres

  • from Part I - Remote Observations and Exploration of Main Belt Asteroids
  • Edited by Simone Marchi, Southwest Research Institute, Boulder, Colorado, Carol A. Raymond, California Institute of Technology, Christopher T. Russell, University of California, Los Angeles
  • Book:
    Vesta and Ceres
    Published online:
    01 April 2022
    Print publication:
    31 March 2022, pp 26-38

  • Summary

    In 1992, NASA’s planetary efforts were invigorated with the launch of the Discovery Program of principal investigator-led missions. Over the next eight years, a group of planetary scientists and engineers gathered regularly to design and propose to NASA solar-electric propulsion missions targeted to various scientifically important bodies. Ultimately, Dawn, a mission to orbit and explore both Vesta and Ceres, was selected for flight in 2001. It launched in 2007, arrived at Vesta in July 2011, and departed in September 2012 for Ceres. Arrival at Ceres occurred in March 2015, where Dawn operated productively until 31 October 2018, when it exhausted its attitude control propellant. Herein, we summarize the history of Dawn and recount the observations and discoveries made by this pioneering mission.