News

  • May 31, 2018
    Dawn
    Dawn Mission: New Orbit, New Opportunities
    This picture is one of the first images returned by Dawn in more than a year, as Dawn moves to its lowest-ever and final orbit around Ceres. Dawn captured this view on May 16, 2018 from an altitude of about 270 miles (440 kilometers).
    Credits: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA

    NASA’s Dawn spacecraft is maneuvering to its lowest-ever orbit for a close-up examination of the inner solar system’s only dwarf planet.

    In early June, Dawn will reach its new, final orbit above Ceres. Soon after, it will begin collecting images and other science data from an unprecedented vantage point. This orbit will be less than 30 miles (50 kilometers) above the surface of Ceres -- 10 times closer than the spacecraft has ever been.

    Dawn will collect gamma ray and neutron spectra, which help scientists understand variations in the chemical makeup of Ceres’ uppermost layer. That very low orbit also will garner some of Dawn’s closest images yet.

    The transfer from Dawn’s previous orbit to its final one is not as simple as making a lane change. Dawn’s operations team worked for months to plot the course for this second extended mission of the veteran spacecraft, which is propelled by an ion engine. Engineers mapped out more than 45,000 possible trajectories before devising a plan that will allow the best science observations.

    Dawn was launched in 2007 and has been exploring the two largest bodies in the main asteroid belt, Vesta and Ceres, to uncover new insights into our solar system. It entered Ceres’ orbit in March 2015.

    “The team is eagerly awaiting the detailed composition and high-resolution imaging from the new, up-close examination,” said Dawn’s Principal Investigator Carol Raymond of NASA’s Jet Propulsion Laboratory, Pasadena, California. “These new high-resolution data allow us to test theories formulated from the previous data sets and discover new features of this fascinating dwarf planet.”

    More detailed information about Dawn’s planned orbit is in Marc Rayman’s Dawn Journal. Rayman is Dawn’s mission director and chief engineer.

    More information about the Dawn mission is available at the following sites:

    https://www.nasa.gov/dawn

    https://dawn.jpl.nasa.gov

     

     

    The Dawn mission is managed by JPL for NASA's Science Mission Directorate in Washington. Dawn is a project of the directorate's Discovery Program, managed by NASA's Marshall Space Flight Center in Huntsville, Alabama. JPL is responsible for overall Dawn mission science. Orbital ATK Inc., in Dulles, Virginia, designed and built the spacecraft. The German Aerospace Center, Max Planck Institute for Solar System Research, Italian Space Agency and Italian National Astrophysical Institute are international partners on the mission team.

    For a complete list of mission participants, visit:

    https://dawn.jpl.nasa.gov/mission

     

    Gretchen McCartney
    Jet Propulsion Laboratory, Pasadena, Calif.
    818-393-6215
    gretchen.p.mccartney@jpl.nasa.gov

    Dwayne Brown / JoAnna Wendel
    NASA Headquarters, Washington
    202-358-1726 / 202-358-1003
    dwayne.c.brown@nasa.gov / joanna.r.wendel@nasa.gov

    2018-119       

    Last Updated: May 31, 2018
    Editor: Tony Greicius