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Mission trades for aerocapture at Neptune

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dc.contributor.advisor Spacecraft Propulsion and Power en_US Noca, Muriel A. Bailey, Robert W. 2011-09-02T21:41:32Z 2011-09-02T21:41:32Z 2004-07-11
dc.identifier.citation AIAA Joint Propulsion Conference, Fort Lauderale, Florida, July 11-14, 2004. en_US
dc.identifier.clearanceno 04-2194
dc.description.abstract A detailed Neptune aerocapture systems analysis and spacecraft design study was performed to improve our understanding of the techonology requirement for such a hard mission. The primary objective was to engineer a point design based on blunt body aeroshell technology and quantitatively assess feasibility and performance. This paper reviews the launch vehicle, propulsion, and trajectory options to reach Neptune in the 2015-2020 time frame using aerocapture and all-propulsive vehicles. It establishes the range of entry conditions that would be consistent with delivering a - 1900 kg total entry vehicle maximum expected mass to Neptune including a - 790 kg orbiter maximum expected mass to the science orbit. Two Neptune probes would be also be delivered prior to the aerocapture maneuver. Results show that inertial entry velocities in the range of 28 to 30 km/s are to be expected for chemical and solar electric propulsion options with several gravity assists (combinations of Venus, Earth and Jupiter gravity assists). Trip times range from approximately 10-11 years for aerocapture orbiters to 15 years for all-propulsive vehicles. This paper shows that the use of aerocapture enables this mission given the payload to deliver around Neptune compared to an all-propulsive orbit insertion approach. However, an all-propulsive chemical insertion option is possible for lower payload masses than the one needed for this science mission. Both approaches require a Delta IV heavy class launch vehicle. 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, 2004. en_US
dc.subject aerocapture en_US
dc.subject mission studies en_US
dc.title Mission trades for aerocapture at Neptune en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Astrodynamics en_US

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