galpy.actionAngle.actionAngle.EccZmaxRperiRap¶

actionAngle.EccZmaxRperiRap(*args, **kwargs)[source]

NAME:

EccZmaxRperiRap

PURPOSE:

evaluate the eccentricity, maximum height above the plane, peri- and apocenter

INPUT:

Either:

1. R,vR,vT,z,vz[,phi]:
1. floats: phase-space value for single object (phi is optional) (each can be a Quantity)
2. numpy.ndarray: [N] phase-space values for N objects (each can be a Quantity)
2. Orbit instance: initial condition used if that’s it, orbit(t) if there is a time given as well as the second argument

OUTPUT:

(e,zmax,rperi,rap)

HISTORY:

2017-12-12 - Written - Bovy (UofT)