Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: Notesfiles $Revision: 1.7.0.10 $; site ccvaxa
Path: utzoo!linus!decvax!bellcore!ulysses!burl!clyde!cbosgd!ihnp4!inuxc!pur-ee!uiucdcs!ccvaxa!wombat
From: wombat@ccvaxa.UUCP
Newsgroups: net.space
Subject: Re: Planet prefixes
Message-ID: <46100005@ccvaxa>
Date: Sat, 22-Feb-86 22:22:00 EST
Article-I.D.: ccvaxa.46100005
Posted: Sat Feb 22 22:22:00 1986
Date-Received: Wed, 26-Feb-86 04:23:10 EST
References: <4012@<860220161736>
Lines: 22
Nf-ID: #R:<860220161736:4012:ccvaxa:46100005:000:1001
Nf-From: ccvaxa.UUCP!wombat    Feb 22 21:22:00 1986


The following is things I remember and things found in *Modern Spacecraft
Dynamics & Control* by Marshall Kaplan:

The generic terms are periapsis and apoapsis. The affix for the moon seems
to be -lune. Most of the problem seems to be avoided by refering to
subscripted variables from various equations. The subscripts are standard
symbols for the planets: circle with dot in center for the sun, circle with
cross inside for the earth, crescent for the moon, circle with cross below
for Venus, and so on. I seem to remember -jove being the affix for Jupiter.
For the other planets, if you want to talk about something other than
periapsis or apoapsis, it looks like you can use geo- as long as the context
makes clear which planet you're discussing.

As an aside, Kaplan is a reasonable textbook with wonderful end-of-chapter
problems.

"When you are about to die, a wombat is better than no company at all."
				Roger Zelazny, *Doorways in the Sand*

						Wombat
					ihnp4!uiucdcs!ccvaxa!wombat