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Mars double-flyby free returns

Show simple item record Jesick, Mark 2016-07-20T16:37:32Z 2016-07-20T16:37:32Z 2015-01-11
dc.identifier.citation 25th AAS/AIAA Space Flight Mechanics Meeting, Williamsburg, Virginia, January 11-15, 2015 en_US
dc.identifier.clearanceno 15-0031
dc.description.abstract 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. 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, 2015 en_US
dc.title Mars double-flyby free returns en_US
dc.type Preprint en_US

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