A subset of Earth-originating Mars double-flyby ballistic trajectories is documented. The subset consists of those trajectories that, after the first Mars flyby, perform a half-revolution transfer with Mars before returning to Earth. This class of free returns is useful for both human and robotic Mars missions because of its low geocentric energy at departure and arrival, and because of its extended stay time in the vicinity of Mars. Ballistic opportunities are documented over Earth departure dates ranging from 2015 through 2100. The mission is viable over three or four consecutive Mars synodic periods and unavailable for the next four, with the pattern repeating approximately every 15 years. Over the remainder of the century, a minimum Earth departure hyperbolic excess speed of 3.16 km / s , a minimum Earth atmospheric entry speed of 11.47 km / s , and a minimum flight time of 904 days are observed. The algorithm used to construct these trajectories is presented along with several examples.


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    Titel :

    Mars Double-Flyby Free Returns


    Beteiligte:
    Jesick, Mark (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2015-08-07


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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