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Mission design for a 1980 Encke slow flyby using solar electric propulsionThe comet Encke at its apparition in 1980 is investigated as the target for a solar electric slow flyby mission having a flight time of approximately two years. Mission trade off studies are performed for two modes: namely the direct earth to Encke mode and the Venus gravity assist mode. Baseline missions for each mode are selected which flyby Encke at 4 km/s 30 days before perihelion. The direct mission baseline is investigated in detail for trajectory parameters related to spacecraft and science requirements. The Venus flyby mode can deliver the same payload with a total power requirement about 20% less than the direct mode. The cost is a longer flight time and a Venus flyby at about 500 km above the surface. One asteroid can be encountered at very close range on either mission. The asteroids available and the extra propellant required are determined.
Document ID
19740034833
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bender, D. F.
Atkins, K. L.
Sauer, C. C., Jr.
(California Institute of Technology, Jet Propulsion Laboratory, Advanced Projects Group, Pasadena Calif., United States)
Date Acquired
August 7, 2013
Publication Date
July 1, 1973
Subject Category
Space Sciences
Report/Patent Number
AAS PAPER 73-204
Report Number: AAS PAPER 73-204
Meeting Information
Meeting: Astrodynamics Conference
Location: Vail, CO
Country: US
Start Date: July 16, 1973
End Date: July 18, 1973
Sponsors: American Institute of Aeronautics and Astronautics, American Astronautical Society
Accession Number
74A17583
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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