osculating (Keplerian) zh:orbital elements (left) versus zh:proper orbital elements (right) for numbered zh:asteroids in the zh:main belt. The plots are of zh:inclinations i against eccentricities e.

Clumps in the (right) plot of proper orbital elements indicate the location of asteroid families, while they are almost indistinguishable in the (left) plot of standard Keplerian orbital elements.

This diagram was created by me (Piotr Deuar).

The right plot is a reduced version of zh::Image:Asteroid_proper_elements_i_vs_e.png, an image made using data for 96944 zh:minor planets that was obtained from the AstDys site. This data was dated March 2005, and computed by Z. Knezevic and A. Milani.