Ferraz Mello

1983 XF. Discovered 1983 Dec. 1 by E. Bowell at Anderson Mesa.

Named in honor of Sylvio Ferraz-Mello (1936- ), dynamicist at the University of Sao Paulo, well known for a number of contributions to solar-system dynamics. These include a perturbation model valid for very high eccentricities, the discovery of chaotic eccentricity jumps to values larger than 0.9 in the 3:1

resonance with Jupiter, and the explanation of the lack of large long-lived objects in the 2:1 resonance, in contrast to the existence of many objects in the 3:2 resonance (Hildas). In other areas, he has worked on a Fourier transform able to deal with unevenly spaced observations, Hamiltonian perturbation theories for nonlinear resonances, and the study of variable dMe stars. Ferraz-Mello served as president of IAU Commission 7 (Celestial Mechanics) from 1994 to 1997. (M 35482)

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