 ---
 angular velocity
            lat.n    lon.e      rate (deg./m.y.
 au  -su      7.729   51.196  0.6965
  
 covariance matrix (rad2/m.y.2 e-10
      79.8    -195.8     -45.0
    -195.8     830.3     187.6
     -45.0     187.6      58.8
  
