def METHOD_NAME(self):
    # date range - astropy.time.Time objects
    epochs = {'start': Time('2018-01-02', format='iso'),
              'stop': Time('2018-01-05', format='iso'),
              'step': 6*u.h}
    data = Orbit.from_horizons('Ceres', epochs=epochs)
    assert len(data.table) == 13