code: def to_coord_frame(self, frame, galactocentric_frame=None, **kwargs):
          
  
          if self.ndim != 3:
              raise ValueError("Can only change representation for "
                               "ndim=3 instances.")
  
          if galactocentric_frame is None:
              galactocentric_frame = coord.Galactocentric()
  
          if 'vcirc' in kwargs or 'vlsr' in kwargs:
              import warnings
              warnings.warn("Instead of passing in 'vcirc' and 'vlsr', specify "
                            "these parameters to the input Galactocentric frame "
                            "using the `galcen_v_sun` argument.",
                            DeprecationWarning)
  
          pos_keys = list(self.pos_components.keys())
          vel_keys = list(self.vel_components.keys())
          if (getattr(self, pos_keys[0]).unit == u.one or
                  getattr(self, vel_keys[0]).unit == u.one):
              raise u.UnitConversionError("Position and velocity must have "
                                          "dimensioned units to convert to a "
                                          "coordinate frame.")
  
          # first we need to turn the position into a Galactocentric instance
          gc_c = galactocentric_frame.realize_frame(
              self.pos.with_differentials(self.vel))
          c = gc_c.transform_to(frame)
          return c
docs: Transform the orbit from Galactocentric, cartesian coordinates to
          Heliocentric coordinates in the specified Astropy coordinate frame.
  
          Parameters
          ----------
          frame : :class:`~astropy.coordinates.BaseCoordinateFrame`
              The class or frame instance specifying the desired output frame.
              For example, :class:`~astropy.coordinates.ICRS`.
          galactocentric_frame : :class:`~astropy.coordinates.Galactocentric`
              This is the assumed frame that the position and velocity of this
              object are in. The ``Galactocentric`` instand should have parameters
              specifying the position and motion of the sun in the Galactocentric
              frame, but no data.
  
          Returns
          -------
          c : :class:`~astropy.coordinates.BaseCoordinateFrame`
              An instantiated coordinate frame containing the positions and
              velocities from this object transformed to the specified coordinate
              frame.