Celestial Mechanics and Dynamical Astronomy

, Volume 119, Issue 3–4, pp 379–395 | Cite as

Orbits near central configurations for four equal masses

  • Winston L. Sweatman
Original Article


This study relates to equal-mass four-body orbits close to a quadruple central configuration. Locally, these orbits can be approximated by a perturbation from the homothetic quadruple collision/expansion orbit. Appropriate expressions are derived and the equal-mass four-body Siegel exponents and associated eigenmodes are presented.


Central configurations Relative equilibria Four-body problem Siegel exponents Eigenmodes 



The author is grateful to Douglas Heggie and the University of Edinburgh and Bonnie Steves and Glasgow Caledonian University for their hospitality while progressing this research. He also thanks the organisers and participants of Celmec VI: San Martino al Cimino, Viterbo, Italy for fruitful discussions and the referees of this paper for their constructive comments.


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Institute of Natural and Mathematical SciencesMassey UniversityAucklandNew Zealand

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