galpy.actionAngle.actionAngle.EccZmaxRperiRap

actionAngle.EccZmaxRperiRap(*args, **kwargs)

Evaluate the eccentricity, maximum height above the plane, peri- and apocenter.

Parameters:

• *args (tuple) –

  Either: a) 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

• **kwargs (dict) – A dictionary of keyword arguments.

Returns:

(eccentricity, maximum height above the plane, peri-, and apocenter)

Return type:

tuple

Notes

• 2017-12-12 - Written - Bovy (UofT)