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Dawn orbit determination team : modeling and fitting of optical data at Vesta

Show simple item record Kennedy, Brian Abrahamson, Matt Ardito, Alessandro Haw, Robert Mastrodemos, Nicholas Nandi, Sumita Park, Ryan Rush, Brian Vaughan, Andrew 2013-12-10T22:27:58Z 2013-12-10T22:27:58Z 2013-02-11
dc.identifier.citation 23rd AAS/AIAA Spaceflight Mechanics Meeting, Kauai, Hawaii, February 10-14 2013 en_US
dc.identifier.clearanceno 13-0657
dc.description.abstract The Dawn spacecraft was launched on September 27th, 2007. Its mission is to consecutively rendezvous with and observe the two largest bodies in the main asteroid belt, Vesta and Ceres. It has already completed over a year’s worth of direct observations of Vesta (spanning from early 2011 through late 2012) and is currently on a cruise trajectory to Ceres, where it will begin scientific observations in mid-2015. Achieving this data collection required careful planning and execution from all Dawn operations teams. Dawn’s Orbit Determination (OD) team was tasked with reconstruction of the as-flown trajectory as well as determination of the Vesta rotational rate, pole orientation and ephemeris, among other Vesta parameters. Improved knowledge of the Vesta pole orientation, specifically, was needed to target the final maneuvers that inserted Dawn into the first science orbit at Vesta. To solve for these parameters, the OD team used radiometric data from the Deep Space Network (DSN) along with optical data reduced from Dawn’s Framing Camera (FC) images. This paper will de-scribe the initial determination of the Vesta ephemeris and pole using a combination of radiometric and optical data, and also the progress the OD team has made since then to further refine the knowledge of Vesta’s body frame orientation and rate with these data en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2013 en_US
dc.subject asteroid encounter en_US
dc.subject low thrust en_US
dc.subject imagery en_US
dc.subject optical navigation en_US
dc.title Dawn orbit determination team : modeling and fitting of optical data at Vesta en_US
dc.type Preprint en_US

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