Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!ut-emx!aoab314
From: aoab314@ut-emx (Srinivas Bettadpur)
Newsgroups: sci.space.shuttle
Subject: Re: Gallileo vs Ulysses orbits to Jupiter
Message-ID: <37322@ut-emx>
Date: 18 Sep 90 15:37:27 GMT
References: <1990Sep16.013630.22643@news.arc.nasa.gov> <15004@burdvax.PRC.Unisys.COM>
Organization: Center for Space Research, U of Texas at Austin, Austin, Texas
Lines: 12

In article <15004@burdvax.PRC.Unisys.COM> techpubs@PRC.Unisys.COM (Technical Pub. Vince Short) writes:
>
>My question: if this can be done for Ulysses (direct transfer orbit 
>to Jupiter), why couldn't it have been done for Gallileo which 
>was sent to Jupiter via a complex Venus-Earth-Earth gravity assist orbit.
>Why no PAM on Gallileo? 
     
           I am told that this is because Galileo is intended to orbit
Jupiter, and hence must carry retro-rockets, whereas Ulysses is a
Jupiter flyby only.  Shuttle weight constraints were the reason for
the complicated flight geometry for the former.
                                                Srinivas