arXiv:1303.0181physics.class-ph
Three Classes of Newtonian Three-Body Planar Periodic Orbits
Abstract
We present the results of a numerical search for periodic orbits of three equal masses moving in a plane under the influence of Newtonian gravity, with zero angular momentum. A topological method is used to classify periodic three-body orbits into families, which fall into four classes, with all three previously known families belonging to one class. The classes are defined by the orbits geometric and algebraic symmetries. In each class we present a few orbits initial conditions, 15 in all; 13 of these correspond to distinct orbits.
I googled the name of the first set of orbits and found this https://arxiv.org/pdf/1303.0181.pdf
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Routine plea: please link to abstracts (Šuvakov and Dmitrašinović - Three classes of Newtonian three-body planar periodic orbits - https://arxiv.org/abs/1303.0181) rather than directly to PDFs. (It is an easy click to get from abstract to PDF, but not vice versa.)
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