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Manned Mars Mission Transfer From Mars Parking Orbit to Phobos or DeimosThis paper addresses the problem of orbit transfers from a Mars parking orbit with an inclination of 165 degrees to the Mars moons. The transfer can be accomplished using a three impulse transfer.

The current 1999 baseline manned Mars mission requires a Mars parking orbit with an inclination of 165 degrees. This orbit inclination is necessary due to the direction of the Mars arrival and departure
asymptotes of the interplanetary trajectory. The selection of this inclination for the parking orbit minimized the delta velocity requirements at Mars arrival and departure. This presents a problem In making transfers from this orbit to either Phobos or Deimos since it is a retrograde orbit. It is possible to make this transfer efficiently using a three impulse transfer and an intermediate transfer orbit with a very large apogee altitude. This paper will show how the intermediate transfer orbit apogee can be determined based on a preselected transfer time, the delta velocities required as a function of transfer time, and the propellant required as a function of mission module weight for a transfer time of 5 days. The data presented in this paper Is specifically for the 1999 opposition class mission but the methods outlined are applicable to any other mission which requires a high inclination parking orbit.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Jack Mulqueen
(Marshall Space Flight Center Redstone Arsenal, Alabama, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1986
Publication Information
Publication: Manned Mars Missions Working Group Papers: Volume 1, Section 1-4
Publisher: National Aeronautics and Space Administration
Subject Category
Report/Patent Number
Meeting Information
Meeting: Manned Mars Missions Workshop
Location: Huntsville, AL
Country: US
Start Date: June 10, 1985
End Date: June 14, 1985
Sponsors: National Aeronautics and Space Administration
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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