A study has been made of a method for providing more frequent launch opportunities for multiple-planet Grand Tour type missions to the outer solar system. A Saturn-Jupiter flyby sequence was used in the analysis to initiate the mission instead of the normal Jupiter-Saturn sequence. The Saturn-first approach is shown to yield several new launch opportunities following the 1980 cutoff date for Jupiter-first missions. Results are given for various two-planet, three-planet, and four-planet Jupiter-first and Saturn-first missions. A unique five-planet Saturn-first mission and a Saturn-Jupiter flyby which returns to earth are also discussed. Mission performance is evaluated for each flyby technique by comparing Saturn-first and Jupiter-first missions with respect to launch energy requirements, available launch windows, planetary encounter conditions, and total mission times. (Author)


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    Title :

    Alternate Multiple-Outer-Planet Missions Using a Saturn-Jupiter Flyby Sequence


    Contributors:
    J. W. Young (author) / M. E. Hannah (author)

    Publication date :

    1973


    Size :

    27 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






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    Swenson, B. L. / Mascy, A. C. / Murphy, J. P. et al. | NTRS | 1983