docs: def relocate(self):
          """Move to the position of self.SearchVar"""
  
          name = self.SearchVar.get()
          if self.kbos.has_key(name):
              kbo = self.kbos[name]
              assert isinstance(kbo, orbfit.Orbfit)
              this_time = Time(self.date.get(), scale='utc')
              try:
                  kbo.predict(this_time)
                  self.recenter(kbo.coordinate.ra.radian, kbo.coordinate.dec.radian)
                  self.create_point(kbo.coordinate.ra.radian, kbo.coordinate.dec.radian, color='blue', size=4)
              except:
                  logging.error("failed to compute KBO position")