Distribution of errors in the parameters of galactic orbits integrated using the JSH95 model. Blue open squares denote the intrinsic dispersions of orbital parameters over the number of cycles in a 5 Gyr integration time. Black cross symbols represent the errors introduced by the observational uncertainties in the input data (parallaxes, proper motions, radial velocities, and the adopted solar LSR velocity). Light gray symbols illustrate the total error with a formal uncertainty of 10 km s^-1 in the adopted rotational velocity of the LSR added.