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From: jay@NPOIS.UUCP
Newsgroups: net.space
Subject: (none)
Message-ID: <8603071651.AA17354@ucbvax.berkeley.edu>
Date: Fri, 7-Mar-86 11:51:12 EST
Article-I.D.: ucbvax.8603071651.AA17354
Posted: Fri Mar  7 11:51:12 1986
Date-Received: Sun, 9-Mar-86 00:06:57 EST
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Keith,
	I have read your several articles about the Ulysses probe, with
some interest. I have also seen some general public type publicity about
the mission, though it was more than a year ago. (New York Times).
	My impreesion was that the mission was supposed to circle Jupiter
from the front, and have velocity taken away by it's encounter with
the giant planet. It was then supposed to fall in towards the sun
with an eliptical orbit perihelion about 10 million miles, aphelion
somewhere near Jupiter's orbit.
	One thing that confuses me about all this though, is why don't
we use the planet Mars, or Venus to accomplish the same thing in
considerably less time.
	I would think that It should take a maximum of two encounters
with Venus to put this probe in the desired orbit, plus it would be
close enough to the sun that cheaper solar power could be used for
the whole mission.
	Orbital dynamics is not my forte, so what do I know. You
have posted a bit to the net on this stuff, perhaps you can tell me.

	Anton Winteroak		ihnp4!npois!jay