Accurate targeting of the Deep Space Program Science Experiment (DSPSE) spacecraft to achieve a 100 km sunward flyby of asteroid 1620 Geographos will require that the ground-based ephemeris of Geographos be well known in advance of the encounter. Efforts are underway to ensure that precision optical and radar observations are available for the final asteroid orbit update that takes place several hours prior to the DSPSE flyby. Because the asteroid passes very close to the Earth six days prior to the DSPSE encounter, precision ground-based optical and radar observations should be available. These ground-based data could reduce the asteroid's position uncertainties (1-sigma) to about 10 km. This ground-based target ephemeris error estimate is far lower than for any previous comet or asteroid that has been under consideration as a mission target.


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    Titel :

    Targeting an asteroid: The DSPSE encounter with asteroid 1620 Geographos


    Beteiligte:


    Erscheinungsdatum :

    1993-01-01



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Targeting an Asteroid: The DSPSE Encounter With Asteroid 1620 Geographos (AAS 93-262)

    Yeomans, D. K. / American Astronautical Society / United States; National Aeronautics and Space Administration et al. | British Library Conference Proceedings | 1993


    Groundbased Observations of 1620 Geographos

    Buratti, B. J. / Binzel, R. P. / Magnusson, P. | NTRS | 1994



    Galileo orbit determination for the Gaspra asteroid encounter

    KALLEMEYN, P. / HAW, R. / POLLMEIER, V. et al. | AIAA | 1992


    Mission Design and Navigation of NEAR's Encounter With Asteroid 253 Mathilde

    Scheeres, D. J. / Dunham, D. W. / Farquhar, R. W. et al. | British Library Conference Proceedings | 1998