Methods of Orbit instances, illustrated using an orbit similar to the one at the right in Figure 10. The radial energy (rad. E) is given by ; the vertical energy (vert. E) is defined as . All outputs are in natural units (see Section 2.2), except for those with a physical distance or velocity scale set through ro= or vo=, respectively. The action–angle routines and types corresponding to the adiabatic (ad. approx.) and Staeckel approximations are discussed further in Section 5. Orbit instances have many more methods similar to o.R(), o.ra(), and o.jr().