 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 au  -yz      4.709   43.555  0.6665
  
 covariance matrix (rad2/m.y.2 e-10
      40.6     -79.4     -49.6
     -79.4     165.7     102.5
     -49.6     102.5      66.6
  
