Mon. Not. R. astr. Soc. 321, 507-514 (2001)

A Simple Algorithm for Orbit Classification

Eliza E. Fulton
Joshua E. Barnes

Institute for Astronomy, University of Hawai`i,
2680 Woodlawn Drive, Honolulu, Hawai`i 96822


We describe a simple algorithm for classifying orbits into orbit families. This algorithm works by finding patterns in the sign changes of the principal coordinates. Orbits in the logarithmic potential are studied as an application; we classify orbits into boxlet families, and examine the influence of the core radius on the set of stable orbit families.


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Joshua E. Barnes (

Last modified: March 7, 2001