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Earth-return trajectory options for the 1985-86 Halley opportunityA unique and useful family of ballistic trajectories to Halley's comet is described. The distinguishing feature of this family is that all of the trajectories return to the Earth's vicinity after the Halley intercept. It is shown that, in some cases, the original Earth-return path can be reshaped by Earth-swingby maneuvers to achieve additional small-body encounters. One mission profile includes flybys of the asteroid Geographos and comet Tempel-2 following the Halley intercept. Dual-flyby missions involving comets Encke and Borrelly and the asteroid Anteros are also discussed. Dust and gas samples are collected during the high-velocity (about 70 km/sec) flythrough of Halley, and then returned to a high-apogee Earth orbit. Aerobraking maneuvers are used to bring the sample-return spacecraft to a low-altitude circular orbit where it can be recovered by the Space Shuttle.
Document ID
19820038520
Document Type
Conference Paper
Authors
Farquhar, R. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Dunham, D. W. (Computer Sciences Corp. Silver Spring, MD, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
ASTRONAUTICS (GENERAL)
Report/Patent Number
AIAA PAPER 82-0136
Meeting Information
Aerospace Sciences Meeting(Orlando, FL)
Distribution Limits
Public
Copyright
Other