Article View: sci.astro
Article #4171Re: Finding Lagrange's Libration Points
From: David Smith
Date: Thu, 26 Jan 1989 20:20
Date: Thu, 26 Jan 1989 20:20
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In article <11854@dartvax.Dartmouth.EDU> dalex@eleazar.dartmouth.edu (Dave Alexander) writes: >So if L1, L2, and L3 are loci of unstable equilibrium, how can we expect >an object to librate or oscillate about any of them? I didn't work through the mathematics, but: In an article on ISEE, Aviation Week pointed out that L1 was at a saddle point. The spacecraft was attracted to the Earth-Sun line, orbiting it. In the direction of the line, position was unstable, but quite manageable to the fuel budget. -- David R. Smith, HP Labs dsmith@hplabs.hp.com (415) 857-7898
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ames!ucsd!sdcsvax!ucsdhub!hp-sdd!hplabs!hplabsb!dsmith From: dsmith@hplabsb.HP.COM (David Smith) Newsgroups: sci.astro,sci.space Subject: Re: Finding Lagrange's Libration Points Message-ID: <5125@hplabsb.HP.COM> Date: 26 Jan 89 20:20:36 GMT References: <1989Jan18.044744.18328@sq.uucp> <11854@dartvax.Dartmouth.EDU> Reply-To: dsmith@hplabsb.UUCP (David Smith) Organization: Hewlett-Packard Labs, Palo Alto, CA Lines: 14