1pD-1 ENERGY 凵z。4 MDMENTUM 工 Minor 升 (Energy ellipsoid (Energy ellipsoid for h=20 N. m.s.) for T=50 N. m) Major (h=17 Nms, J i Polhode · Maior axis (T=50Nm) I lara *1/I small Perturb about o/o get small circle path Perturb about @,* get large displacement Figure adapted from P.C. Hughes, Spacecraft Attitude Dynamics (John Wiley and Sons, 1986)