Named in honor of John Eric Chambers (1969– ), graduate student at Manchester University, currently a predoctoral fellow at the Harvard-Smithsonian Center for Astrophysics. John’s research concentrates on the effect of mean-motion resonances on the orbital evolution of solar system objects, and he has recently completed a study of P/Swift-Tuttle, showing that the motion of this object is dominated by the 1:11 resonance with Jupiter. (M 22497) _ _.